WO2011053981A2 - Package configurations for low emi circuits - Google Patents

Package configurations for low emi circuits Download PDF

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Publication number
WO2011053981A2
WO2011053981A2 PCT/US2010/055129 US2010055129W WO2011053981A2 WO 2011053981 A2 WO2011053981 A2 WO 2011053981A2 US 2010055129 W US2010055129 W US 2010055129W WO 2011053981 A2 WO2011053981 A2 WO 2011053981A2
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WO
WIPO (PCT)
Prior art keywords
transistor
package
electronic component
structural portion
electrically connected
Prior art date
Application number
PCT/US2010/055129
Other languages
French (fr)
Other versions
WO2011053981A3 (en
Inventor
Wifeng Wu
Original Assignee
Transphorm Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Transphorm Inc. filed Critical Transphorm Inc.
Priority to JP2012537193A priority Critical patent/JP5883392B2/en
Priority to EP10827654.4A priority patent/EP2497109B1/en
Priority to CN201080049604.5A priority patent/CN102598256B/en
Priority to KR1020127011360A priority patent/KR101737149B1/en
Publication of WO2011053981A2 publication Critical patent/WO2011053981A2/en
Publication of WO2011053981A3 publication Critical patent/WO2011053981A3/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00—Details of semiconductor or other solid state devices
    • H01L23/02—Containers; Seals
    • H01L23/04—Containers; Seals characterised by the shape of the container or parts, e.g. caps, walls
    • H01L23/053—Containers; Seals characterised by the shape of the container or parts, e.g. caps, walls the container being a hollow construction and having an insulating or insulated base as a mounting for the semiconductor body
    • H01L23/057—Containers; Seals characterised by the shape of the container or parts, e.g. caps, walls the container being a hollow construction and having an insulating or insulated base as a mounting for the semiconductor body the leads being parallel to the base
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    • H01L23/00—Details of semiconductor or other solid state devices
    • H01L23/48—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor
    • H01L23/481—Internal lead connections, e.g. via connections, feedthrough structures
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    • H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
    • H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
    • H01L21/48—Manufacture or treatment of parts, e.g. containers, prior to assembly of the devices, using processes not provided for in a single one of the subgroups H01L21/06 - H01L21/326
    • H01L21/4814—Conductive parts
    • H01L21/4871—Bases, plates or heatsinks
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    • H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
    • H01L21/77—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate
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    • H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
    • H01L23/36—Selection of materials, or shaping, to facilitate cooling or heating, e.g. heatsinks
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    • H01L23/367—Cooling facilitated by shape of device
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    • H01L25/11—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices having separate containers the devices being of a type provided for in group H01L29/00
    • H01L25/115—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices having separate containers the devices being of a type provided for in group H01L29/00 the devices being arranged next to each other
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    • H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
    • H01L27/0203—Particular design considerations for integrated circuits
    • H01L27/0248—Particular design considerations for integrated circuits for electrical or thermal protection, e.g. electrostatic discharge [ESD] protection
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    • H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
    • H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
    • H01L29/76—Unipolar devices, e.g. field effect transistors
    • H01L29/772—Field effect transistors
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    • H01L21/48—Manufacture or treatment of parts, e.g. containers, prior to assembly of the devices, using processes not provided for in a single one of the subgroups H01L21/06 - H01L21/326
    • H01L21/4803—Insulating or insulated parts, e.g. mountings, containers, diamond heatsinks
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    • H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
    • H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
    • H01L21/48—Manufacture or treatment of parts, e.g. containers, prior to assembly of the devices, using processes not provided for in a single one of the subgroups H01L21/06 - H01L21/326
    • H01L21/4814—Conductive parts
    • H—ELECTRICITY
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    • H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/42—Wire connectors; Manufacturing methods related thereto
    • H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
    • H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
    • H01L2224/4805—Shape
    • H01L2224/4809—Loop shape
    • H01L2224/48091—Arched
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    • H01L2224/73—Means for bonding being of different types provided for in two or more of groups H01L2224/10, H01L2224/18, H01L2224/26, H01L2224/34, H01L2224/42, H01L2224/50, H01L2224/63, H01L2224/71
    • H01L2224/732—Location after the connecting process
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    • H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
    • H01L29/12—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
    • H01L29/20—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the materials of which they are formed including, apart from doping materials or other impurities, only AIIIBV compounds
    • H01L29/2003—Nitride compounds
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    • H01L2924/11—Device type
    • H01L2924/13—Discrete devices, e.g. 3 terminal devices
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    • H01L2924/1305—Bipolar Junction Transistor [BJT]
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    • H01L2924/13—Discrete devices, e.g. 3 terminal devices
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    • H01L2924/1306—Field-effect transistor [FET]
    • H01L2924/13091—Metal-Oxide-Semiconductor Field-Effect Transistor [MOSFET]
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    • H01L2924/30107—Inductance

Definitions

  • Si MOSFETs silicon-based transistors
  • IGBTs IGBTs
  • FIG. 1 A schematic diagram of a Si power MOSFET is shown in Figure 1. As indicated, the source and gate electrodes 10 and 11, respectively, are on one side of the semiconductor body 13, and the drain electrode 12 is on the opposite side.
  • the transistor Prior to inserting the transistor of Figure 1 into a discreet circuit, the transistor is encased in a package. Schematic examples of conventional transistor packages are shown in Figures 2 and 3.
  • the package includes structural portions, such as the case 24 and package base 23, as well as non-structural portions, such as leads 20-22.
  • the case 24 is formed of an insulating material
  • the package base 23 is formed of a conducting material
  • the gate lead 21 is formed of a conducting material and is electrically connected to the gate electrode 11 of the transistor
  • the drain lead 22 is formed of a conducting material and is electrically connected to the package base 23
  • the source lead 20 is formed of a conducting material and is electrically connected to the source electrode 10 of the transistor.
  • the transistor is mounted directly to the package base 23 with drain electrode 12 in electrical and thermal contact to the package base 23.
  • the drain electrode 12 and package base 23 are connected such that their electric potentials are about the same under all bias conditions and the heat generated during operation can easily dissipate to the package base.
  • Drain lead 22 and drain electrode 12 are thereby electrically connected, since both are electrically connected to the package base 23.
  • a metal bond wire 31 can form an electrical connection between the gate electrode 11 and the gate lead 21.
  • source lead 20 can be electrically connected to source electrode 10 via bond wire 30.
  • the package in Figure 3 is similar to that of Figure 2, except that the package case 26 is formed of a conducting material, so the package base 23 and case 26 are at the same electrical potential (i.e., they are electrically connected).
  • the source and gate leads 20 and 21, respectively are electrically isolated from the package case 26, while the drain lead 22 is electrically connected to the case.
  • Drain electrode 12 is electrically connected to the package base 23
  • gate lead 21 is electrically connected to the gate electrode 11 of the transistor
  • source lead 20 is electrically connected to the source electrode 10 of the transistor.
  • the packaged transistor of Figure 2 when it is used in a circuit assembly or on a circuit board, it is typically mounted on a heat sink 27 with an insulating spacer 28 between the package base 23 and the heat sink 27 to form transistor assembly 25.
  • the insulating spacer 28 is made thin to allow heat generated by the transistor to transfer to the heat sink through the insulating spacer 28.
  • the insulating spacer 28 has at least a minimum thickness, because decreasing the thickness of the insulating spacer 28 increases the capacitance between the package base 23 and the heat sink 27.
  • the heat sink 27 is connected to a circuit ground, hence the capacitance between the drain and the heat sink translates to a capacitance between the drain and ground.
  • Figure 5 shows a circuit schematic of the transistor assembly 25 of Figure 4 after it is mounted on a circuit assembly or circuit board, and its source is connected to ground 33.
  • Capacitor 32 represents the capacitance between the package base 23 and the circuit ground, i.e., the capacitance between drain electrode 12 and the circuit ground.
  • capacitor 32 During operation of the transistor assembly 25, the charging and discharging of capacitor 32 not only causes severe switching losses but also results in the emission of electromagnetic radiation, also known as electromagnetic interference (EMI), thereby degrading the performance of the circuit.
  • Capacitor 32 can cause common-mode AC currents to flow to ground through a path outside the desired signal path. The larger the capacitance of capacitor 32, the higher the switching loss and the intensity of common-mode EMI emission, which results in degradation of electrical performance.
  • improved electrical performance which may require a thick insulating spacer 28, and dissipation of heat produced by the transistor during operation, which may require a thin insulating spacer.
  • Device and package configurations are desirable for which both switching losses and EMI can be adequately mitigated and simultaneously heat can be adequately dissipated when the device is used in a circuit such as a high voltage, high power switching circuit.
  • an electronic component includes a high voltage switching transistor encased in a package.
  • the high voltage switching transistor comprises a source electrode, a gate electrode, and a drain electrode all on a first side of the high voltage switching transistor.
  • the source electrode is electrically connected to a conductive structural portion of the package.
  • an assembly in one aspect, includes a first transistor encased in a first package, the first package comprising a first conductive structural portion and a second transistor encased in a second package, the second package comprising a second conductive structural portion.
  • a source of the first transistor is electrically connected to the first conductive structural portion and a drain of the second transistor is electrically connected to the second conductive structural portion.
  • an assembly in another aspect, includes a first transistor comprising a first source, the first transistor encased in a first package, the first package comprising a first conductive structural portion and a second transistor comprising a second source and a second drain, the second transistor encased in a second package, the second package comprising a second conductive structural portion.
  • the first source is electrically connected to the first conductive structural portion
  • the second source is electrically isolated from the second conductive structural portion
  • the second drain is electrically isolated from the second conductive structural portion.
  • an electronic component in yet another aspect, includes a first transistor, comprising a first source and a first drain, a second transistor, comprising a second source and a second drain, and a single package comprising a conductive structural portion, the package encasing both the first transistor and the second transistor.
  • the first source is electrically connected to the conductive structural portion of the package
  • the first drain is electrically connected to the second source
  • the first transistor is directly mounted to the conductive structural portion of the package.
  • the high voltage switching transistor can be a lateral device.
  • the high voltage switching transistor can be a III-N transistor.
  • the high voltage switching transistor can comprise an insulating or semi-insulating substrate.
  • the high voltage switching transistor can be configured to operate at a bias of about 300V or higher.
  • the high voltage switching transistor can be an enhancement mode transistor.
  • the conductive structural portion of the package can comprise a package base.
  • the conductive structural portion of the package can be electrically connected to a heat sink.
  • the conductive structural portion of the package can be electrically connected to a circuit ground or a DC ground.
  • the high voltage switching transistor can be a III-N transistor comprising an insulating or semi-insulating portion.
  • the insulating or semi-insulating portion can be an insulating or semi-insulating substrate.
  • the high voltage switching transistor can be mounted directly on the conductive structural portion of the package with the insulating or semi-insulating portion adjacent to or contacting the conductive structural portion of the package.
  • a first ratio of EMI power produced during operation of the electronic component to a total output power of the electronic component can be less than a second ratio of EMI power produced during operation of a second electronic component to a total output power of the second electronic component, wherein the second electronic component comprises a high voltage switching transistor with a drain electrode electrically connected to a conductive structural portion of a package of the second electronic component, and the conductive structural portion of the package of the second electronic component is separated from the circuit ground or the DC ground by an insulating spacer.
  • a first ratio of switching power loss incurred during operation of the electronic component to a total output power of the electronic component can be reduce as compared to a second ratio of switching power loss incurred during operation of a second component to a total output power of the second electronic component, wherein the second electronic component comprises a high voltage switching transistor with a drain electrode electrically connected to a conductive structural portion of a package of the second electronic component, and the conductive structural portion of the package of the second electronic component is separated from the circuit ground or the DC ground by an insulating spacer.
  • the package can further comprise a gate lead, a source lead, and a drain lead, wherein the drain lead is between the gate lead and the source lead.
  • the package can further comprise a gate lead, a source lead, and a drain lead, wherein the source lead is between the gate lead and the drain lead.
  • the first transistor or the second transistor can be a high voltage switching transistor.
  • the first conductive structural portion can be mounted directly on a heat sink and can be electrically connected to the heat sink.
  • the first conductive structural portion can be electrically connected to a circuit ground or a DC ground.
  • the second conductive structural portion can be electrically connected to a DC high voltage supply.
  • the second conductive structural portion can be separated from a circuit ground or a DC ground by an insulating spacer.
  • a capacitance between the second conductive structural portion and the circuit ground or the DC ground can cause the second conductive structural portion to be AC grounded.
  • a drain of the first transistor can be electrically connected to a source of the second transistor.
  • the first transistor can be a low-side switch and the second transistor can be a high-side switch.
  • a half bridge can be formed from a device described herein.
  • a bridge circuit can be formed from a device described herein.
  • the first transistor or the second transistor can be a III-N transistor.
  • the first transistor and the second transistor can share a common substrate.
  • the substrate can be an insulating or semi-insulating substrate.
  • the first drain and the second source can be formed of a single electrode.
  • a device or component can also include a capacitor, wherein the package encases the capacitor.
  • the second drain can be electrically connected to a first terminal of the capacitor and a second terminal of the capacitor can be electrically connected to the conductive structural portion of the package.
  • the package can comprise a first source lead, a first gate lead, a first drain lead, a second gate lead, and a second drain lead.
  • the first transistor can further comprise a first gate
  • the second transistor further comprises a second gate
  • the conductive structural portion of the can be is electrically connected to the first source lead
  • the first gate can be electrically connected to the first gate lead
  • the second gate can be electrically connected to the second gate lead
  • the second drain can be electrically connected to the second drain lead
  • the first drain and the second source can be both electrically connected to the first drain lead.
  • the devices described herein can include one or more of the following advantages.
  • Packaged lateral high voltage transistors can reduce or eliminate the capacitance between the drain of the transistor and the circuit or DC ground that can result from the package configuration. Capacitance between the drain of the transistor and the circuit or DC ground can cause current to flow to a ground outside of the desired signal path, which can increase EMI or switching losses during operation of the device. Increased EMI or switching losses can degrade performance of the device or a circuit in which the device is included. Therefore, reducing or eliminating the capacitance between the drain of the transistor and the circuit or DC ground can result in a device or circuit that operates more efficiently.
  • heat dissipation is improved by some of the transistors described herein. Heat dissipation can improve the longevity and performance of the device. Heat dissipation may also allow for the device to be used in a wider variety of applications.
  • Figure 1 is a schematic diagram of a silicon-based semiconductor transistor of the prior art.
  • Figures 2-4 are perspective cross-sectional diagrams of packaged
  • Figure 5 is a circuit schematic of the packaged semiconductor transistor of
  • Figure 6 is a perspective cross-sectional diagram of a packaged semiconductor transistor.
  • Figure 7 is a circuit diagram of a half bridge.
  • Figure 8 is a perspective view of components of a half bridge.
  • Figure 9 is a cross-sectional side view of each of the two switches of the half bridge of Figure 8.
  • Figures 10-11 are circuit diagrams of half bridges.
  • Figure 12 is a cross-sectional side view of each of the two switches of a half bridge.
  • Figure 13 is a circuit diagram of a half bridge formed of the two switches in
  • Figure 14 is a perspective view of a single package that can encase both transistors of a half bridge.
  • Figures 15-16 are side views of electronic devices of a half bridge.
  • FIG. 6 is a schematic illustration of an electronic component, which includes a high voltage switching transistor encased in a package.
  • a high voltage switching transistor is a transistor optimized for high voltage switching applications. That is, when the transistor is off, it is capable of blocking high voltages, such as about 300V or higher, about 600V or higher, or about 1200V or higher, and when the transistor is on, it has a sufficiently low on-resistance RON for the application in which it is used, i.e., it experiences sufficiently low conduction loss when a substantial current passes through the device.
  • the high voltage switching transistor includes an insulating or semi-insulating portion 44, a semiconductor body 43, a source electrode 40, a gate electrode 41, and a drain electrode 42.
  • the insulating or semi-insulating portion 44 is an insulating or semi-insulating substrate or carrier wafer, while in other implementations, the insulating or semi-insulating portion is an insulating or semi-insulating part of the semiconductor body. In yet other implementations, the insulating or semi-insulating portion 44 is a shim, such as a wafer level shim.
  • a “substrate” is a material layer on top of which
  • a "shim" is an insulating material on top of which a semiconductor device or component is mounted to prevent the portion of the device or component which contacts the shim from being in electrical contact with a layer or structure underlying the shim.
  • a packaged semiconductor transistor can be mounted on a ground plane with a shim between the semiconductor package and the ground plane, such that the shim prevents the semiconductor package from being in electrical contact with the ground plane.
  • a shim differs from a substrate in that a shim is attached to the device or component after the semiconductor layers are formed.
  • a shim is between a semiconductor device and the package which encloses the device.
  • insulating or semi- insulating portion 44 is a shim, it is between the semiconductor body 43 and package base 23.
  • a shim is attached to a semiconductor wafer containing a plurality of devices, prior to the wafer being diced such that each of the individual devices are separated from one another.
  • This type of shim known as a "wafer-level shim" can be useful in that it can simplify fabrication of devices or components which are formed on conducting substrates. The simplification in the fabrication process occurs because a large wafer-level shim can be connected to the wafer prior to dicing, rather than first dicing the wafer into individual devices and then connecting a shim to each individual device.
  • the package includes structural portions, such as a case 24 and a package base
  • non-structural portions of a package are portions which form the basic shape or molding of the package and provide the structural rigidity of the package.
  • structural portions are portions which form the basic shape or molding of the package and provide the structural rigidity of the package.
  • the package base 23 is formed of an electrically conducting material, i.e., the package base 23 is an electrically conductive structural portion of the package.
  • the case 24 is formed of an insulating material, gate and drain leads 21 and 22, respectively, are each formed of a conducting material, and source lead 20 is formed of a conducting material and is electrically connected to the package base 23.
  • two or more contacts or other items are said to be “electrically connected” if they are connected by a material which is sufficiently conducting to ensure that the electric potential at each of the contacts or other items is intended to be the same, i.e., is about the same, at all times under any bias conditions.
  • the package base 23 and case 24 are replaced by a conducting case, i.e., an electrically conductive structural portion, which completely surrounds the enclosed transistor (not shown), similar to the package case 26 in Figure 3.
  • the insulating or semi-insulating portion 44 is mounted directly to the package base 23.
  • an additional conducting or semiconducting layer such as a conducting or semiconducting substrate, is included between the insulating or semi-insulating portion 44 and the package base 23 (not shown).
  • the insulating or semi-insulating portion 44 can be a semi-insulating semiconductor layer, such as a semi-insulating semiconductor buffer layer on top of which the active semiconductor layers which are included in the
  • a semi-insulating layer is formed by doping a semiconductor layer to render the layer electrically insulating, although not as insulating as some insulating materials.
  • the additional conducting or semiconductor layer can be part of the high voltage switching transistor, or it can be a separate layer.
  • the package base 23 can be mounted directly to a heat sink 27 such that the package base 23 and heat sink 27 are in electrical and thermal contact, i.e., they are electrically connected, and heat generated by the transistor can dissipate through the heat sink 27.
  • the heat sink 27 can also be a circuit ground, or it can be electrically connected to a circuit ground, in which case the package base 23 is electrically connected to circuit ground.
  • the source, gate, and drain electrodes 40-42 are all located on the uppermost side of the transistor. That is, they are located on the side of the semiconductor body 43 furthest from the portion of the transistor that is mounted to the package base 23. Having the source, drain, and gate electrodes on the same side of the semiconductor body can be achieved by employing a lateral device (i.e., a lateral high voltage switching transistor).
  • Connector 31 which can be a bond wire and formed of an electrically conducting material, is at one end connected to gate electrode 41 and at the other end connected to gate lead 21 , such that gate electrode 41 is electrically connected to gate lead 21.
  • drain lead 22 is electrically connected to drain electrode 42 via connector 62, which can be a bond wire and also formed of an electrically conducting material.
  • Source electrode 40 is electrically connected to the case 23 via an electrically conducting connector 60, which can also be a bond wire.
  • Source electrode 40 and source lead 20 can both be AC or DC grounded, since both are electrically connected to the package base 23, which is electrically connected to a heat sink 27, and the heat sink 27 can be a circuit ground or can be electrically connected to a circuit ground, and the circuit ground can be an AC or DC ground.
  • a node, device, layer, or component is said to be "AC grounded” if it is held at a fixed DC potential at all times during operation. AC and DC grounds are collectively referred to as "circuit grounds”.
  • Connectors 31, 60, and 62 are all electrically isolated from one another.
  • source lead 20 is shown to be positioned between gate lead 21 and drain lead 22, which may be advantageous in that it can reduce interference between input and output currents as compared to a transistor in a package for which the drain lead is positioned between the gate lead and the source lead.
  • the drain lead 22 may be advantageous to have the drain lead 22 positioned between the gate lead 21 and the source lead 20, as illustrated in the packages of Figures 2-4, since this configuration may be more compatible with other existing parts and components that may be used in conjunction with the packaged transistor.
  • the high voltage switching transistor can be any transistor which can perform the functions of a high voltage switching transistor as previously described.
  • the high voltage switching transistor is an enhancement mode device, i.e., a normally off device, such that the threshold voltage greater than OV, such as about 1.5V-2V or greater.
  • the high voltage switching transistor is a depletion mode device, i.e., a normally on device, such that the threshold voltage is less than 0V.
  • the high voltage switching transistor can be a lateral device, since lateral transistors can be readily fabricated for which the source, drain, and gate electrodes are all on the same side of the device.
  • the high voltage switching transistor can be a Ill-Nitride or III-N device or transistor, such as a III-N high electron mobility transistor (HEMT) or heterojunction field effect transistor (HFET). That is, the semiconductor body 43 can include at least two layers of III-N material.
  • the terms Ill-Nitride or III-N materials, layers, devices, etc. refer to a material or device comprised of a compound semiconductor material according to the stoichiometric formula Al x In y Ga z N, where x+y+z is about 1. Examples of III-N devices and device structures which can be designed to satisfy the requirements for a high voltage switching transistor can be found in U.S.
  • FIG. 7 is a circuit diagram of a half bridge, one or more of which can be combined to form a bridge circuit.
  • a half bridge includes two switches 65 and 66, both of which are typically formed of high voltage switching transistors, connected as shown.
  • the source of switch 65 is electrically connected to a circuit ground or DC ground 33
  • the drain of switch 66 is electrically connected to a DC high voltage supply 38, which is an AC ground
  • the source of switch 66 is electrically connected to the drain of switch 65.
  • the switch 65 for which the source is electrically connected to ground is typically referred to as a "low-side switch”
  • the switch 66 for which the drain is electrically connected to the high voltage supply is typically referred to as a "high-side switch”.
  • the voltage at which the DC high voltage supply 38 is fixed depends on the particular circuit application, but can typically be about 300V or higher, about 600V or higher, or about 1200V or higher.
  • a half bridge also typically includes diodes 75 and 76 connected anti-parallel to switches 65 and 66, respectively. However, it may be possible for these diodes to be eliminated, i.e., to not be included, when specific types of transistors are used for switches 65 and 66, as further described in U.S. patent application number 12/368,200, filed February 9, 2009, which is hereby incorporated by reference throughout.
  • FIGs 8 and 9 illustrate configurations for each of the two switches of the half bridge of Figure 7.
  • the switches are each packaged in a configuration that can result in reduced or minimal EMI for the half bridge, particularly as compared to a half bridge where the low-side switch 65 is formed of one of the packaged devices shown in Figures 2-4.
  • Figure 8 shows a perspective view of the half bridge
  • Figure 9 shows a perspective cross-sectional diagram of each of the two switches.
  • the package configuration for the low-side switch 65 is similar to or the same as that of the packaged transistor of Figure 6.
  • the low-side switch 65 includes a transistor encased in a package.
  • the transistor can include an insulating or semi-insulating portion 44.
  • the transistor can be mounted directly to the package with the insulating or semi-insulating portion 44 adjacent to or contacting the package base 23.
  • the source electrode 40 of the transistor is electrically connected to the package base 23.
  • the package base 23 is mounted directly to a heat sink 27, and the heat sink is electrically connected to a circuit or DC ground 33, such that the package base 23 and the source electrode 40 are both electrically connected to a circuit or DC ground, i.e., they are grounded or DC grounded.
  • the gate electrode 41 is electrically connected to the gate lead 21 of the package (not shown), and the drain electrode 42 is electrically connected to the drain lead 22 of the package (not shown).
  • the source lead 20 can be electrically connected to the package base 23.
  • the gate lead and the drain lead are both electrically isolated from the package base 23.
  • the transistor included in the low-side switch 65 can be a high voltage switching transistor, and the source, gate, and drain electrodes 40-42, respectively, can all be located on the uppermost side of the transistor.
  • the transistor is a III-N device, such as a III-N HEMT or HFET. In some implementations, the transistor is an enhancement-mode device. In some implementations, the transistor is a lateral device, such as a lateral high voltage switching transistor.
  • the high-side switch 66 in the assembly of Figures 8 and 9 includes a second transistor encased in a second package.
  • the second transistor can include an insulating or semi-insulating portion 44'.
  • the second transistor can be mounted directly to the second package with the insulating or semi-insulating portion 44' adjacent to or contacting the package base 23 ' of the second package.
  • the drain electrode 42' of the second transistor is electrically connected to the package base 23' of the second package.
  • the gate electrode 41 ' of the second transistor is electrically connected to the gate lead 21 ' of the second package
  • the source electrode 40' of the second transistor is electrically connected to the source lead 20' of the second package (not shown).
  • the source, gate, and drain electrodes 40'-42', respectively are all located on the uppermost side of the transistor, and connector 73, which can be a wire bond, electrically connects the drain electrode 42' to the package base 23 ' of the second package, as seen in Figure 9.
  • the drain electrode 42' is on the opposite side of the semiconductor body 43 ' from the source and gate electrodes 40' and 41 ', respectively, and the drain electrode 42' is mounted directly to the package base 23 ' of the second package, as was shown for the packaged transistors in Figures 2-4.
  • the drain of the low-side switch is electrically connected to the source of the high-side switch (not shown), which can be achieved by electrically connecting the source lead 20' of the second package to the drain lead 22 of the first package.
  • the drain lead 22' of the second package is electrically connected both to the package base 23 ' of the second package and to a DC high voltage supply (not shown).
  • the source and gate leads of the second package are both electrically isolated from the second package.
  • the package base 23 ' of the second package is mounted on a heat sink 27' with an insulating spacer 28 between the package base 23 ' and the heat sink 27', and the heat sink 27' is electrically connected to the circuit or DC ground 33.
  • the insulating spacer 28 can be made thin to allow heat generated while the transistor is operated to transfer from the transistor to the heat sink through the insulating spacer 28.
  • the high side and low side transistors 66 and 65 can each be mounted on individual heat sinks 27' and 27, as shown in Figures 8 and 9, or they may both be mounted on a single heat sink (not shown).
  • the second transistor is a III-N device, such as a III-N HEMT or HFET or current aperture vertical electron transistor (CAVET).
  • the second transistor is an enhancement-mode device.
  • the second transistor is a lateral device, such as a lateral high voltage switching transistor, while in other implementations it is a vertical device.
  • the transistors used for the two switches 65 and 66 are substantially similar or the same.
  • Figure 10 shows a circuit diagram for the assembly of Figures 8 and 9, and
  • Figure 1 1 shows a circuit diagram for a half bridge where both switches 165 and 166 are formed of one of the packaged transistors of Figures 2-4.
  • Diodes 75 and 76 which were shown in Figure 7 and in some cases must be included in the half bridge, are omitted from these circuit diagrams but could be included in the half bridge.
  • switches 165 and 166 are formed of one of the packaged transistors of Figures 2-4.
  • Diodes 75 and 76 which were shown in Figure 7 and in some cases must be included in the half bridge, are omitted from these circuit diagrams but could be included in the half bridge.
  • switches 165 and 166 are formed of one of the packaged transistors of Figures 2-4.
  • Diodes 75 and 76 which were shown in Figure 7 and in some cases must be included in the half bridge, are omitted from these circuit diagrams but could be included in the half bridge.
  • switches 165 and 166 are formed of one of the packaged transistors of Figures 2-4.
  • Diodes 75 and 76 which were shown in Figure
  • both circuits include a substantial capacitance between the DC high voltage supply 38 and the DC ground, represented by capacitor 72.
  • the capacitance value of capacitor 72 is given by the capacitance between the package base 23' of the high-side switch and the heat sink 27'. This capacitance is substantial, since the package base 23' of the high-side switch has a substantially large cross-sectional area and is separated from the DC ground by a short distance, the distance being the thickness of insulating spacer 28. However, this capacitance does not cause any substantial EMI during circuit operation, since the voltages on either side of the capacitor remain approximately constant.
  • capacitor 72 causes the DC high voltage supply 38 to be AC coupled to DC ground, resulting in the high voltage supply 38 behaving as an AC ground, which can be beneficial to circuit operation. Consequently, the package base 23' of the high-side switch is AC grounded, since it is electrically connected to the DC high voltage supply.
  • the circuit of Figure 1 1 contains a substantial capacitance between the drain electrode of the low-side switch 165 and the DC ground, represented by capacitor 82. As previously described, this substantial capacitance results from the package base of the low- side switch being in close proximity to but not electrically connected to the DC ground. In the configuration of Figures 8 and 9, since the package base 23 of the low-side switch 65 is electrically connected to the DC ground, there is no substantial capacitance between the drain electrode of the low-side switch and the DC ground for this configuration. Capacitor 82 can lead to an increase in EMI or common-mode EMI during circuit operation. Hence, the package configuration of Figures 8 and 9 can result in lower EMI as compared to a half bridge where each of the switches 165 and 166 is formed of one of the packaged transistors of Figures 2-4.
  • Figure 12 illustrates another package configuration for each of the two switches of a half bridge which can result in reduced or minimal EMI for the half bridge, particularly as compared to a half bridge where one of the package configurations shown in Figures 2-4 is used for each of the two switches.
  • each switch in the half bridge of Figure 12 is individually packaged.
  • Figure 13 is a circuit diagram corresponding to the assembly of Figure 12. Again for the sake of clarity, some of the features of the assembly of Figure 12 are not shown in the illustration; however these features are described below.
  • the package configuration for the low-side switch 65 is the same as that described for the low-side switch in Figures 8 and 9. However, the high-side switch 266 is configured differently.
  • the high-side switch 266 again includes a second transistor encased in a second package, the second transistor including an insulating or semi-insulating portion 44' which can be an insulating or semi-insulating substrate.
  • the second transistor is mounted directly to the second package with the insulating or semi-insulating portion 44' adjacent to or contacting the package base 23' of the second package.
  • the source, gate, and drain electrodes 40'-42', respectively, are all located on the uppermost side of the transistor, that is, on the side opposite to the package base 23'.
  • the source electrode 40' is electrically connected to the source lead of the second package (not shown), the gate electrode 41 ' is electrically connected to the gate lead of the second package (not shown), and the drain electrode 42' is electrically connected to the drain lead of the second package (not shown).
  • the source, gate, and drain electrodes of the second transistor are all electrically isolated from the package base 23 ' of the second package.
  • the source, gate, and drain leads of the second package are all electrically isolated from the package base 23' of the second package (not shown).
  • the package base 23 ' of the second package is mounted directly to a heat sink 27', and the heat sink is electrically connected to a circuit or DC ground 33, such that the package base 23 ' can be electrically connected to DC ground.
  • the high side and low side transistors 266 and 65 can each be mounted on individual heat sinks 27' and 27, as shown in Figure 12, or they may both be mounted on a single heat sink (not shown).
  • heat sink 27/27' is substantially free of any electrically insulating material.
  • the drain of the low-side switch is electrically connected to the source of the high-side switch (not shown), which can be achieved by electrically connecting the source lead of the second package to the drain lead of the first package.
  • the drain lead of the second package is electrically connected to a DC high voltage supply (not shown).
  • the second transistor in Figure 12 is a III-N device, such as a III-N HEMT or HFET.
  • the second transistor is an enhancement-mode device.
  • the second transistor is a lateral device, such as a lateral high voltage switching transistor.
  • the transistors used for the two switches 65 and 66 are substantially similar or the same.
  • the assembly of Figure 12 lacks the capacitor 82 which led to higher EMI in the circuit depicted by the diagram of Figure 11, since in Figure 12 the package base 23 of the low-side transistor is electrically connected to circuit or DC ground. Hence, low EMI can be achieved during circuit operation. Since there is no substantial capacitance between the DC high voltage supply and ground (i.e., no capacitor 72) due to the configuration of high side switch 266, the DC high voltage supply 38 and the circuit or DC ground 33 may need to be coupled with a discrete capacitor to ensure that the DC high voltage supply 38 is an AC ground. Additionally, since in Figure 12 there is no insulating spacer between the package base 23' of the second package and the heat sink 27', heat generated during circuit operation can be dissipated more readily for the assembly of Figure 12 than in other half bridge assemblies.
  • Figure 14 shows a single package that can encase both transistors of a half bridge.
  • the single package can also encase other devices, such as capacitors, as described below.
  • the single package along with the devices which are encased in the package, can form a single electronic component.
  • the single package includes a package base 23 formed of a conducting material, i.e., a conducting structural portion, a case 24 formed of an insulating material, a first gate lead 91, a first drain lead 92, a second gate lead 93, a second drain lead 94, and a first source lead 90 which is electrically connected to the package base 23.
  • the package base 23 can be mounted directly to a heat sink 27 such that the package base 23 and heat sink 27 are in electrical and thermal contact.
  • the heat sink 27 can be a circuit or DC ground, or it may be electrically connected to a circuit or DC ground, such that the heat sink 27 is grounded.
  • Figures 15 and 16 show configurations for the two transistors that are encased in the single package of Figure 14. Again for the sake of clarity, some of the features of the transistor configurations of Figures 15 and 16 are not shown in the illustrations; however these features are described below.
  • the low-side and high-side switches 365 and 366 are both transistors that can each include an insulating or semi-insulating portion 44/44', such as an insulating or semi-insulating substrate.
  • the transistors can both be lateral devices, such as III-N HEMTs, which include source, gate, and drain electrodes 40-42 (or 40'-42'), respectively.
  • the transistors can be high voltage switching transistors.
  • the transistors can both be mounted directly to the package base 23 with the insulating or semi-insulating portions 44/44' adjacent to or contacting the package base 23.
  • the source 40 of the low-side switch 65 is electrically connected to the package base 23, which results in the source 40 being electrically connected to the first source lead 90 of the package (shown in Figure 14).
  • the gate 41 of the low-side switch 365 is electrically connected to the first gate lead 91 of the package (not shown).
  • the gate 41 ' of the high-side switch 366 is electrically connected to the second gate lead 93 of the package (not shown).
  • the drain 42' of the high-side switch 66 is electrically connected to the second drain lead 94 of the package (not shown).
  • the drain 42 of the low-side switch 365 and the source 40' of the high-side switch 366 are both electrically connected to the first drain lead 92 of the package (not shown). Hence, the drain 42 of the low-side switch 365 and the source 40' of the high-side switch 366 are electrically connected to one another.
  • the drain 42' of the high-side switch 366 can also be electrically connected to a terminal of a capacitor 76, which can be mounted to the package with the terminal opposite to the terminal connected to the drain 42' electrically connected to the package base 23.
  • Capacitor 76 can serve the same purpose as the capacitor 72 shown in the circuit diagram of
  • Figure 10 The configuration of Figure 15 can simplify the manufacturing process of the half bridge, especially as compared to configurations for which each of the two transistors is encased in its own package. Additionally, including capacitor 76 in the package can reduce the parasitic inductances between the circuit AC grounds (33 and 38 in Figure 10) and the output node (78 in Figure 10).
  • FIG. 16 The configuration of Figure 16 is similar to that of Figure 15, except that the two transistors 365' and 366' are formed on a common insulating or semi-insulating portion 44, such as an insulating or semi-insulating substrate, and the two transistors can share a common active device layer 43.
  • the drain of the low-side switch and the source of the high- side switch can also be formed of a single electrode 96.
  • the transistors can both be lateral devices, such as III-N HEMTs.
  • the transistors can be high voltage switching transistors.
  • the transistors can be mounted directly to the package base 23 with the common insulating or semi-insulating portion 44 adjacent to or contacting the package base 23.
  • the source 40 of the low-side switch can be electrically connected to the package base 23, which results in the source 40 being electrically connected to the first source lead 90 of the package (see Figure 14).
  • the gate 41 of the low-side switch can be electrically connected to the first gate lead 91 of the package (connection not shown).
  • the gate 41 ' of the high-side switch can be electrically connected to the second gate lead 93 of the package (connection not shown).
  • the drain 42' of the high-side switch can be electrically connected to the second drain lead 94 of the package (connection not shown).
  • Electrode 96 which is both the drain of the low-side switch and the source of the high-side switch, can be electrically connected to the first drain lead 92 of the package (connection not shown).
  • the drain 42' of the high-side switch can also be electrically connected to a terminal of a capacitor 76, which can be mounted to the package with the opposite terminal electrically connected to the package base 23.
  • Capacitor 76 can serve the same purpose as the capacitor 72 shown in the circuit diagram of Figure 9. As compared to the configuration of Figure 14, this configuration can further simplify the manufacturing process.

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Abstract

An electronic component includes a high voltage switching transistor encased in a package. The high voltage switching transistor comprises a source electrode, a gate electrode, and a drain electrode all on a first side of the high voltage switching transistor. The source electrode is electrically connected to a conducting structural portion of the package. Assemblies using the abovementioned transistor with another transistor can be formed, where the source of one transistor can be electrically connected to a conducting structural portion of a package containing the transistor and a drain of the second transistor is electrically connected to the second conductive structural portion of a package that houses the second transistor. Alternatively, the source of the second transistor is electrically isolated from its conductive structural portion, and the drain of the second transistor is electrically isolated from its conductive structural portion.

Description

PACKAGE CONFIGURATIONS FOR LOW EMI CIRCUITS
TECHNICAL FIELD
[0001] Packaging configurations of semiconductor devices for various circuit applications are described.
BACKGROUND
[0002] Currently, most high voltage switching circuits are designed using silicon- based transistors, such as Si MOSFETs or IGBTs. A schematic diagram of a Si power MOSFET is shown in Figure 1. As indicated, the source and gate electrodes 10 and 11, respectively, are on one side of the semiconductor body 13, and the drain electrode 12 is on the opposite side.
[0003] Prior to inserting the transistor of Figure 1 into a discreet circuit, the transistor is encased in a package. Schematic examples of conventional transistor packages are shown in Figures 2 and 3. Referring to Figure 2, the package includes structural portions, such as the case 24 and package base 23, as well as non-structural portions, such as leads 20-22. The case 24 is formed of an insulating material, the package base 23 is formed of a conducting material, the gate lead 21 is formed of a conducting material and is electrically connected to the gate electrode 11 of the transistor, the drain lead 22 is formed of a conducting material and is electrically connected to the package base 23, and the source lead 20 is formed of a conducting material and is electrically connected to the source electrode 10 of the transistor. As shown, the transistor is mounted directly to the package base 23 with drain electrode 12 in electrical and thermal contact to the package base 23. The drain electrode 12 and package base 23 are connected such that their electric potentials are about the same under all bias conditions and the heat generated during operation can easily dissipate to the package base. Drain lead 22 and drain electrode 12 are thereby electrically connected, since both are electrically connected to the package base 23. A metal bond wire 31 can form an electrical connection between the gate electrode 11 and the gate lead 21. Similarly, source lead 20 can be electrically connected to source electrode 10 via bond wire 30.
[0004] The package in Figure 3 is similar to that of Figure 2, except that the package case 26 is formed of a conducting material, so the package base 23 and case 26 are at the same electrical potential (i.e., they are electrically connected). For this package, the source and gate leads 20 and 21, respectively, are electrically isolated from the package case 26, while the drain lead 22 is electrically connected to the case. Drain electrode 12 is electrically connected to the package base 23, gate lead 21 is electrically connected to the gate electrode 11 of the transistor, and source lead 20 is electrically connected to the source electrode 10 of the transistor.
[0005] As shown in Figure 4, when the packaged transistor of Figure 2 is used in a circuit assembly or on a circuit board, it is typically mounted on a heat sink 27 with an insulating spacer 28 between the package base 23 and the heat sink 27 to form transistor assembly 25. The insulating spacer 28 is made thin to allow heat generated by the transistor to transfer to the heat sink through the insulating spacer 28. However, the insulating spacer 28 has at least a minimum thickness, because decreasing the thickness of the insulating spacer 28 increases the capacitance between the package base 23 and the heat sink 27. In many cases, the heat sink 27 is connected to a circuit ground, hence the capacitance between the drain and the heat sink translates to a capacitance between the drain and ground. When the heat sink is not connected to the circuit ground, there is typically a large capacitance between the heat sink and the circuit ground, since the surface area of the heat sink is typically much larger than that of the transistor. This again results in a large total capacitance between the drain and the circuit ground.
[0006] Figure 5 shows a circuit schematic of the transistor assembly 25 of Figure 4 after it is mounted on a circuit assembly or circuit board, and its source is connected to ground 33. Capacitor 32 represents the capacitance between the package base 23 and the circuit ground, i.e., the capacitance between drain electrode 12 and the circuit ground.
During operation of the transistor assembly 25, the charging and discharging of capacitor 32 not only causes severe switching losses but also results in the emission of electromagnetic radiation, also known as electromagnetic interference (EMI), thereby degrading the performance of the circuit. Capacitor 32 can cause common-mode AC currents to flow to ground through a path outside the desired signal path. The larger the capacitance of capacitor 32, the higher the switching loss and the intensity of common-mode EMI emission, which results in degradation of electrical performance. Hence, there is a trade-off between improved electrical performance, which may require a thick insulating spacer 28, and dissipation of heat produced by the transistor during operation, which may require a thin insulating spacer. Device and package configurations are desirable for which both switching losses and EMI can be adequately mitigated and simultaneously heat can be adequately dissipated when the device is used in a circuit such as a high voltage, high power switching circuit. SUMMARY
[0007] In one aspect, an electronic component includes a high voltage switching transistor encased in a package. The high voltage switching transistor comprises a source electrode, a gate electrode, and a drain electrode all on a first side of the high voltage switching transistor. The source electrode is electrically connected to a conductive structural portion of the package.
[0008] In one aspect, an assembly is described. The assembly includes a first transistor encased in a first package, the first package comprising a first conductive structural portion and a second transistor encased in a second package, the second package comprising a second conductive structural portion. A source of the first transistor is electrically connected to the first conductive structural portion and a drain of the second transistor is electrically connected to the second conductive structural portion.
[0009] In another aspect, an assembly is described. The assembly includes a first transistor comprising a first source, the first transistor encased in a first package, the first package comprising a first conductive structural portion and a second transistor comprising a second source and a second drain, the second transistor encased in a second package, the second package comprising a second conductive structural portion. The first source is electrically connected to the first conductive structural portion, the second source is electrically isolated from the second conductive structural portion, and the second drain is electrically isolated from the second conductive structural portion.
[0010] In yet another aspect, an electronic component is described. The component includes a first transistor, comprising a first source and a first drain, a second transistor, comprising a second source and a second drain, and a single package comprising a conductive structural portion, the package encasing both the first transistor and the second transistor. The first source is electrically connected to the conductive structural portion of the package, the first drain is electrically connected to the second source, and the first transistor is directly mounted to the conductive structural portion of the package.
Implementations of the various devices may include one or more of the following features. The high voltage switching transistor can be a lateral device. The high voltage switching transistor can be a III-N transistor. The high voltage switching transistor can comprise an insulating or semi-insulating substrate. The high voltage switching transistor can be configured to operate at a bias of about 300V or higher. The high voltage switching transistor can be an enhancement mode transistor. The conductive structural portion of the package can comprise a package base. The conductive structural portion of the package can be electrically connected to a heat sink. The conductive structural portion of the package can be electrically connected to a circuit ground or a DC ground. The high voltage switching transistor can be a III-N transistor comprising an insulating or semi-insulating portion. The insulating or semi-insulating portion can be an insulating or semi-insulating substrate. The high voltage switching transistor can be mounted directly on the conductive structural portion of the package with the insulating or semi-insulating portion adjacent to or contacting the conductive structural portion of the package. A first ratio of EMI power produced during operation of the electronic component to a total output power of the electronic component can be less than a second ratio of EMI power produced during operation of a second electronic component to a total output power of the second electronic component, wherein the second electronic component comprises a high voltage switching transistor with a drain electrode electrically connected to a conductive structural portion of a package of the second electronic component, and the conductive structural portion of the package of the second electronic component is separated from the circuit ground or the DC ground by an insulating spacer. A first ratio of switching power loss incurred during operation of the electronic component to a total output power of the electronic component can be reduce as compared to a second ratio of switching power loss incurred during operation of a second component to a total output power of the second electronic component, wherein the second electronic component comprises a high voltage switching transistor with a drain electrode electrically connected to a conductive structural portion of a package of the second electronic component, and the conductive structural portion of the package of the second electronic component is separated from the circuit ground or the DC ground by an insulating spacer. The package can further comprise a gate lead, a source lead, and a drain lead, wherein the drain lead is between the gate lead and the source lead. The package can further comprise a gate lead, a source lead, and a drain lead, wherein the source lead is between the gate lead and the drain lead.
[0011] The first transistor or the second transistor can be a high voltage switching transistor. The first conductive structural portion can be mounted directly on a heat sink and can be electrically connected to the heat sink. The first conductive structural portion can be electrically connected to a circuit ground or a DC ground. The second conductive structural portion can be electrically connected to a DC high voltage supply. The second conductive structural portion can be separated from a circuit ground or a DC ground by an insulating spacer. A capacitance between the second conductive structural portion and the circuit ground or the DC ground can cause the second conductive structural portion to be AC grounded. A drain of the first transistor can be electrically connected to a source of the second transistor. The first transistor can be a low-side switch and the second transistor can be a high-side switch. A half bridge can be formed from a device described herein. A bridge circuit can be formed from a device described herein. The first transistor or the second transistor can be a III-N transistor. The first transistor or the second transistor can be a lateral device.
[0012] The first transistor and the second transistor can share a common substrate.
The substrate can be an insulating or semi-insulating substrate. The first drain and the second source can be formed of a single electrode. A device or component can also include a capacitor, wherein the package encases the capacitor. The second drain can be electrically connected to a first terminal of the capacitor and a second terminal of the capacitor can be electrically connected to the conductive structural portion of the package. The package can comprise a first source lead, a first gate lead, a first drain lead, a second gate lead, and a second drain lead. The first transistor can further comprise a first gate, the second transistor further comprises a second gate, the conductive structural portion of the can be is electrically connected to the first source lead, the first gate can be electrically connected to the first gate lead, the second gate can be electrically connected to the second gate lead, the second drain can be electrically connected to the second drain lead, and the first drain and the second source can be both electrically connected to the first drain lead.
[0013] In some implementations, the devices described herein can include one or more of the following advantages. Packaged lateral high voltage transistors can reduce or eliminate the capacitance between the drain of the transistor and the circuit or DC ground that can result from the package configuration. Capacitance between the drain of the transistor and the circuit or DC ground can cause current to flow to a ground outside of the desired signal path, which can increase EMI or switching losses during operation of the device. Increased EMI or switching losses can degrade performance of the device or a circuit in which the device is included. Therefore, reducing or eliminating the capacitance between the drain of the transistor and the circuit or DC ground can result in a device or circuit that operates more efficiently In addition, heat dissipation is improved by some of the transistors described herein. Heat dissipation can improve the longevity and performance of the device. Heat dissipation may also allow for the device to be used in a wider variety of applications.
DESCRIPTION OF DRAWINGS
[0014] Figure 1 is a schematic diagram of a silicon-based semiconductor transistor of the prior art. [0015] Figures 2-4 are perspective cross-sectional diagrams of packaged
semiconductor transistors of the prior art.
[0016] Figure 5 is a circuit schematic of the packaged semiconductor transistor of
Figure 4.
[0017] Figure 6 is a perspective cross-sectional diagram of a packaged semiconductor transistor.
[0018] Figure 7 is a circuit diagram of a half bridge.
[0019] Figure 8 is a perspective view of components of a half bridge.
[0020] Figure 9 is a cross-sectional side view of each of the two switches of the half bridge of Figure 8.
[0021] Figures 10-11 are circuit diagrams of half bridges.
[0022] Figure 12 is a cross-sectional side view of each of the two switches of a half bridge.
[0023] Figure 13 is a circuit diagram of a half bridge formed of the two switches in
Figure 11.
[0024] Figure 14 is a perspective view of a single package that can encase both transistors of a half bridge.
[0025] Figures 15-16 are side views of electronic devices of a half bridge.
[0026] Like reference symbols in the various drawings indicate like elements.
DETAILED DESCRIPTION
[0027] Figure 6 is a schematic illustration of an electronic component, which includes a high voltage switching transistor encased in a package. As used herein, a high voltage switching transistor is a transistor optimized for high voltage switching applications. That is, when the transistor is off, it is capable of blocking high voltages, such as about 300V or higher, about 600V or higher, or about 1200V or higher, and when the transistor is on, it has a sufficiently low on-resistance RON for the application in which it is used, i.e., it experiences sufficiently low conduction loss when a substantial current passes through the device. The high voltage switching transistor includes an insulating or semi-insulating portion 44, a semiconductor body 43, a source electrode 40, a gate electrode 41, and a drain electrode 42. In some implementations, the insulating or semi-insulating portion 44 is an insulating or semi-insulating substrate or carrier wafer, while in other implementations, the insulating or semi-insulating portion is an insulating or semi-insulating part of the semiconductor body. In yet other implementations, the insulating or semi-insulating portion 44 is a shim, such as a wafer level shim.
[0028] As used herein, a "substrate" is a material layer on top of which
semiconductor material layers of a semiconductor device are epitaxially grown such that the crystalline structure of the portion of semiconductor material contacting or adjacent to the substrate at least partially conforms to or is at least partially determined by the crystalline structure of the substrate. In some implementations, the substrate does not contribute to any conduction of current through the semiconductor device. As used herein, a "shim" is an insulating material on top of which a semiconductor device or component is mounted to prevent the portion of the device or component which contacts the shim from being in electrical contact with a layer or structure underlying the shim. For example, a packaged semiconductor transistor can be mounted on a ground plane with a shim between the semiconductor package and the ground plane, such that the shim prevents the semiconductor package from being in electrical contact with the ground plane. A shim differs from a substrate in that a shim is attached to the device or component after the semiconductor layers are formed. In some implementations, a shim is between a semiconductor device and the package which encloses the device. For example, in Figure 6, when insulating or semi- insulating portion 44 is a shim, it is between the semiconductor body 43 and package base 23. In some implementations, a shim is attached to a semiconductor wafer containing a plurality of devices, prior to the wafer being diced such that each of the individual devices are separated from one another. This type of shim, known as a "wafer-level shim", can be useful in that it can simplify fabrication of devices or components which are formed on conducting substrates. The simplification in the fabrication process occurs because a large wafer-level shim can be connected to the wafer prior to dicing, rather than first dicing the wafer into individual devices and then connecting a shim to each individual device.
[0029] The package includes structural portions, such as a case 24 and a package base
23, as well as non-structural portions, such as leads 20-22. As used herein, "structural portions" of a package are portions which form the basic shape or molding of the package and provide the structural rigidity of the package. In many cases, when a packaged transistor is used in a discrete circuit, a structural portion of the package is directly mounted to the circuit or circuit board. In the transistor package of Figure 6, the package base 23 is formed of an electrically conducting material, i.e., the package base 23 is an electrically conductive structural portion of the package. The case 24 is formed of an insulating material, gate and drain leads 21 and 22, respectively, are each formed of a conducting material, and source lead 20 is formed of a conducting material and is electrically connected to the package base 23. As used herein, two or more contacts or other items are said to be "electrically connected" if they are connected by a material which is sufficiently conducting to ensure that the electric potential at each of the contacts or other items is intended to be the same, i.e., is about the same, at all times under any bias conditions. In some implementations, the package base 23 and case 24 are replaced by a conducting case, i.e., an electrically conductive structural portion, which completely surrounds the enclosed transistor (not shown), similar to the package case 26 in Figure 3.
[0030] The insulating or semi-insulating portion 44 is mounted directly to the package base 23. In some implementations, an additional conducting or semiconducting layer, such as a conducting or semiconducting substrate, is included between the insulating or semi-insulating portion 44 and the package base 23 (not shown). When an additional conducting or semiconducting layer is included, the insulating or semi-insulating portion 44 can be a semi-insulating semiconductor layer, such as a semi-insulating semiconductor buffer layer on top of which the active semiconductor layers which are included in the
semiconductor body 43 are formed. In some implementations, a semi-insulating layer is formed by doping a semiconductor layer to render the layer electrically insulating, although not as insulating as some insulating materials. The additional conducting or semiconductor layer can be part of the high voltage switching transistor, or it can be a separate layer. The package base 23 can be mounted directly to a heat sink 27 such that the package base 23 and heat sink 27 are in electrical and thermal contact, i.e., they are electrically connected, and heat generated by the transistor can dissipate through the heat sink 27. The heat sink 27 can also be a circuit ground, or it can be electrically connected to a circuit ground, in which case the package base 23 is electrically connected to circuit ground.
[0031] The source, gate, and drain electrodes 40-42 are all located on the uppermost side of the transistor. That is, they are located on the side of the semiconductor body 43 furthest from the portion of the transistor that is mounted to the package base 23. Having the source, drain, and gate electrodes on the same side of the semiconductor body can be achieved by employing a lateral device (i.e., a lateral high voltage switching transistor). Connector 31, which can be a bond wire and formed of an electrically conducting material, is at one end connected to gate electrode 41 and at the other end connected to gate lead 21 , such that gate electrode 41 is electrically connected to gate lead 21. Similarly, drain lead 22 is electrically connected to drain electrode 42 via connector 62, which can be a bond wire and also formed of an electrically conducting material. Source electrode 40 is electrically connected to the case 23 via an electrically conducting connector 60, which can also be a bond wire. Source electrode 40 and source lead 20 can both be AC or DC grounded, since both are electrically connected to the package base 23, which is electrically connected to a heat sink 27, and the heat sink 27 can be a circuit ground or can be electrically connected to a circuit ground, and the circuit ground can be an AC or DC ground. As used herein, a node, device, layer, or component is said to be "AC grounded" if it is held at a fixed DC potential at all times during operation. AC and DC grounds are collectively referred to as "circuit grounds".
[0032] Connectors 31, 60, and 62 are all electrically isolated from one another. In
Figure 6, source lead 20 is shown to be positioned between gate lead 21 and drain lead 22, which may be advantageous in that it can reduce interference between input and output currents as compared to a transistor in a package for which the drain lead is positioned between the gate lead and the source lead. However, in some cases it may be advantageous to have the drain lead 22 positioned between the gate lead 21 and the source lead 20, as illustrated in the packages of Figures 2-4, since this configuration may be more compatible with other existing parts and components that may be used in conjunction with the packaged transistor.
[0033] The high voltage switching transistor can be any transistor which can perform the functions of a high voltage switching transistor as previously described. In some implementations, the high voltage switching transistor is an enhancement mode device, i.e., a normally off device, such that the threshold voltage greater than OV, such as about 1.5V-2V or greater. In other implementations, the high voltage switching transistor is a depletion mode device, i.e., a normally on device, such that the threshold voltage is less than 0V. The high voltage switching transistor can be a lateral device, since lateral transistors can be readily fabricated for which the source, drain, and gate electrodes are all on the same side of the device. The high voltage switching transistor can be a Ill-Nitride or III-N device or transistor, such as a III-N high electron mobility transistor (HEMT) or heterojunction field effect transistor (HFET). That is, the semiconductor body 43 can include at least two layers of III-N material. As used herein, the terms Ill-Nitride or III-N materials, layers, devices, etc., refer to a material or device comprised of a compound semiconductor material according to the stoichiometric formula AlxInyGazN, where x+y+z is about 1. Examples of III-N devices and device structures which can be designed to satisfy the requirements for a high voltage switching transistor can be found in U.S. Publication number 2009-0072272, published March 19, 2009, U.S. Publication number 2009-0072240, published March 19, 2009, U.S. Publication number 2009-0146185, published June 11, 2009, U.S. patent application number 12/108,449, filed April 23, 2008, U.S. patent application number 12/332,284, filed December 10, 2008, U.S. patent application number 12/368,248, filed February 9, 2009, and U.S. Publication number 2009-0072269, published March 19, 2009, all of which are hereby incorporated by reference throughout.
[0034] For the electronic component of Figure 6, when the heat sink 27 is a circuit ground, such as a DC ground, or is electrically connected to a circuit ground, and the capacitance between the drain electrode 42 and the circuit ground is not substantial, i.e., it is sufficiently small such that it does not substantially affect or degrade the performance of the component or the circuit containing the component. Consequently, switching losses and EMI or common-mode EMI produced during operation can be reduced for the component of Figure 6 as compared to that for the components of Figure 2-4.
[0035] Figure 7 is a circuit diagram of a half bridge, one or more of which can be combined to form a bridge circuit. As seen in Figure 7, a half bridge includes two switches 65 and 66, both of which are typically formed of high voltage switching transistors, connected as shown. The source of switch 65 is electrically connected to a circuit ground or DC ground 33, the drain of switch 66 is electrically connected to a DC high voltage supply 38, which is an AC ground, and the source of switch 66 is electrically connected to the drain of switch 65. The switch 65 for which the source is electrically connected to ground is typically referred to as a "low-side switch", and the switch 66 for which the drain is electrically connected to the high voltage supply is typically referred to as a "high-side switch". The voltage at which the DC high voltage supply 38 is fixed depends on the particular circuit application, but can typically be about 300V or higher, about 600V or higher, or about 1200V or higher. As seen in Figure 7, a half bridge also typically includes diodes 75 and 76 connected anti-parallel to switches 65 and 66, respectively. However, it may be possible for these diodes to be eliminated, i.e., to not be included, when specific types of transistors are used for switches 65 and 66, as further described in U.S. patent application number 12/368,200, filed February 9, 2009, which is hereby incorporated by reference throughout.
[0036] Figures 8 and 9 illustrate configurations for each of the two switches of the half bridge of Figure 7. The switches are each packaged in a configuration that can result in reduced or minimal EMI for the half bridge, particularly as compared to a half bridge where the low-side switch 65 is formed of one of the packaged devices shown in Figures 2-4.
Figure 8 shows a perspective view of the half bridge, while Figure 9 shows a perspective cross-sectional diagram of each of the two switches. For the sake of clarity, some of the features of the assembly of Figures 8 and 9 are not shown in the illustrations; however these features are described below. In the assembly of Figures 8 and 9, the package configuration for the low-side switch 65 is similar to or the same as that of the packaged transistor of Figure 6. The low-side switch 65 includes a transistor encased in a package. The transistor can include an insulating or semi-insulating portion 44. The transistor can be mounted directly to the package with the insulating or semi-insulating portion 44 adjacent to or contacting the package base 23. The source electrode 40 of the transistor is electrically connected to the package base 23. The package base 23 is mounted directly to a heat sink 27, and the heat sink is electrically connected to a circuit or DC ground 33, such that the package base 23 and the source electrode 40 are both electrically connected to a circuit or DC ground, i.e., they are grounded or DC grounded. The gate electrode 41 is electrically connected to the gate lead 21 of the package (not shown), and the drain electrode 42 is electrically connected to the drain lead 22 of the package (not shown). The source lead 20 can be electrically connected to the package base 23. The gate lead and the drain lead are both electrically isolated from the package base 23. The transistor included in the low-side switch 65 can be a high voltage switching transistor, and the source, gate, and drain electrodes 40-42, respectively, can all be located on the uppermost side of the transistor. In some implementations, the transistor is a III-N device, such as a III-N HEMT or HFET. In some implementations, the transistor is an enhancement-mode device. In some implementations, the transistor is a lateral device, such as a lateral high voltage switching transistor.
[0037] The high-side switch 66 in the assembly of Figures 8 and 9 includes a second transistor encased in a second package. The second transistor can include an insulating or semi-insulating portion 44'. The second transistor can be mounted directly to the second package with the insulating or semi-insulating portion 44' adjacent to or contacting the package base 23 ' of the second package. The drain electrode 42' of the second transistor is electrically connected to the package base 23' of the second package. The gate electrode 41 ' of the second transistor is electrically connected to the gate lead 21 ' of the second package
(not shown), and the source electrode 40' of the second transistor is electrically connected to the source lead 20' of the second package (not shown). In some implementations, the source, gate, and drain electrodes 40'-42', respectively, are all located on the uppermost side of the transistor, and connector 73, which can be a wire bond, electrically connects the drain electrode 42' to the package base 23 ' of the second package, as seen in Figure 9. In other implementations, the drain electrode 42' is on the opposite side of the semiconductor body 43 ' from the source and gate electrodes 40' and 41 ', respectively, and the drain electrode 42' is mounted directly to the package base 23 ' of the second package, as was shown for the packaged transistors in Figures 2-4. The drain of the low-side switch is electrically connected to the source of the high-side switch (not shown), which can be achieved by electrically connecting the source lead 20' of the second package to the drain lead 22 of the first package. The drain lead 22' of the second package is electrically connected both to the package base 23 ' of the second package and to a DC high voltage supply (not shown). The source and gate leads of the second package are both electrically isolated from the second package. The package base 23 ' of the second package is mounted on a heat sink 27' with an insulating spacer 28 between the package base 23 ' and the heat sink 27', and the heat sink 27' is electrically connected to the circuit or DC ground 33. The insulating spacer 28 can be made thin to allow heat generated while the transistor is operated to transfer from the transistor to the heat sink through the insulating spacer 28. The high side and low side transistors 66 and 65, respectively, can each be mounted on individual heat sinks 27' and 27, as shown in Figures 8 and 9, or they may both be mounted on a single heat sink (not shown). In some implementations, the second transistor is a III-N device, such as a III-N HEMT or HFET or current aperture vertical electron transistor (CAVET). In some implementations, the second transistor is an enhancement-mode device. In some implementations, the second transistor is a lateral device, such as a lateral high voltage switching transistor, while in other implementations it is a vertical device. In some implementations, the transistors used for the two switches 65 and 66 are substantially similar or the same.
[0038] Figure 10 shows a circuit diagram for the assembly of Figures 8 and 9, and
Figure 1 1 shows a circuit diagram for a half bridge where both switches 165 and 166 are formed of one of the packaged transistors of Figures 2-4. Diodes 75 and 76, which were shown in Figure 7 and in some cases must be included in the half bridge, are omitted from these circuit diagrams but could be included in the half bridge. In addition to switches
65/165 and 66/166, the DC ground 33, and the DC high voltage supply 38, both circuits include a substantial capacitance between the DC high voltage supply 38 and the DC ground, represented by capacitor 72. The capacitance value of capacitor 72 is given by the capacitance between the package base 23' of the high-side switch and the heat sink 27'. This capacitance is substantial, since the package base 23' of the high-side switch has a substantially large cross-sectional area and is separated from the DC ground by a short distance, the distance being the thickness of insulating spacer 28. However, this capacitance does not cause any substantial EMI during circuit operation, since the voltages on either side of the capacitor remain approximately constant. The substantial capacitance of capacitor 72 causes the DC high voltage supply 38 to be AC coupled to DC ground, resulting in the high voltage supply 38 behaving as an AC ground, which can be beneficial to circuit operation. Consequently, the package base 23' of the high-side switch is AC grounded, since it is electrically connected to the DC high voltage supply.
[0039] The circuit of Figure 1 1 contains a substantial capacitance between the drain electrode of the low-side switch 165 and the DC ground, represented by capacitor 82. As previously described, this substantial capacitance results from the package base of the low- side switch being in close proximity to but not electrically connected to the DC ground. In the configuration of Figures 8 and 9, since the package base 23 of the low-side switch 65 is electrically connected to the DC ground, there is no substantial capacitance between the drain electrode of the low-side switch and the DC ground for this configuration. Capacitor 82 can lead to an increase in EMI or common-mode EMI during circuit operation. Hence, the package configuration of Figures 8 and 9 can result in lower EMI as compared to a half bridge where each of the switches 165 and 166 is formed of one of the packaged transistors of Figures 2-4.
[0040] Figure 12 illustrates another package configuration for each of the two switches of a half bridge which can result in reduced or minimal EMI for the half bridge, particularly as compared to a half bridge where one of the package configurations shown in Figures 2-4 is used for each of the two switches. As with the half bridge of Figures 8 and 9, each switch in the half bridge of Figure 12 is individually packaged. Figure 13 is a circuit diagram corresponding to the assembly of Figure 12. Again for the sake of clarity, some of the features of the assembly of Figure 12 are not shown in the illustration; however these features are described below. In the assembly of Figure 12, the package configuration for the low-side switch 65 is the same as that described for the low-side switch in Figures 8 and 9. However, the high-side switch 266 is configured differently.
[0041] The high-side switch 266 again includes a second transistor encased in a second package, the second transistor including an insulating or semi-insulating portion 44' which can be an insulating or semi-insulating substrate. The second transistor is mounted directly to the second package with the insulating or semi-insulating portion 44' adjacent to or contacting the package base 23' of the second package. The source, gate, and drain electrodes 40'-42', respectively, are all located on the uppermost side of the transistor, that is, on the side opposite to the package base 23'. The source electrode 40' is electrically connected to the source lead of the second package (not shown), the gate electrode 41 ' is electrically connected to the gate lead of the second package (not shown), and the drain electrode 42' is electrically connected to the drain lead of the second package (not shown). The source, gate, and drain electrodes of the second transistor are all electrically isolated from the package base 23 ' of the second package. The source, gate, and drain leads of the second package are all electrically isolated from the package base 23' of the second package (not shown). The package base 23 ' of the second package is mounted directly to a heat sink 27', and the heat sink is electrically connected to a circuit or DC ground 33, such that the package base 23 ' can be electrically connected to DC ground. Again, the high side and low side transistors 266 and 65, respectively, can each be mounted on individual heat sinks 27' and 27, as shown in Figure 12, or they may both be mounted on a single heat sink (not shown). In some implementations, heat sink 27/27' is substantially free of any electrically insulating material. The drain of the low-side switch is electrically connected to the source of the high-side switch (not shown), which can be achieved by electrically connecting the source lead of the second package to the drain lead of the first package. The drain lead of the second package is electrically connected to a DC high voltage supply (not shown).
[0042] In some implementations, the second transistor in Figure 12 is a III-N device, such as a III-N HEMT or HFET. In some implementations, the second transistor is an enhancement-mode device. In some implementations, the second transistor is a lateral device, such as a lateral high voltage switching transistor. In some implementations, the transistors used for the two switches 65 and 66 are substantially similar or the same.
[0043] As seen in the circuit diagram of Figure 13, the assembly of Figure 12 lacks the capacitor 82 which led to higher EMI in the circuit depicted by the diagram of Figure 11, since in Figure 12 the package base 23 of the low-side transistor is electrically connected to circuit or DC ground. Hence, low EMI can be achieved during circuit operation. Since there is no substantial capacitance between the DC high voltage supply and ground (i.e., no capacitor 72) due to the configuration of high side switch 266, the DC high voltage supply 38 and the circuit or DC ground 33 may need to be coupled with a discrete capacitor to ensure that the DC high voltage supply 38 is an AC ground. Additionally, since in Figure 12 there is no insulating spacer between the package base 23' of the second package and the heat sink 27', heat generated during circuit operation can be dissipated more readily for the assembly of Figure 12 than in other half bridge assemblies.
[0044] Figure 14 shows a single package that can encase both transistors of a half bridge. The single package can also encase other devices, such as capacitors, as described below. Hence, the single package, along with the devices which are encased in the package, can form a single electronic component. The single package includes a package base 23 formed of a conducting material, i.e., a conducting structural portion, a case 24 formed of an insulating material, a first gate lead 91, a first drain lead 92, a second gate lead 93, a second drain lead 94, and a first source lead 90 which is electrically connected to the package base 23. The package base 23 can be mounted directly to a heat sink 27 such that the package base 23 and heat sink 27 are in electrical and thermal contact. The heat sink 27 can be a circuit or DC ground, or it may be electrically connected to a circuit or DC ground, such that the heat sink 27 is grounded.
[0045] Figures 15 and 16 show configurations for the two transistors that are encased in the single package of Figure 14. Again for the sake of clarity, some of the features of the transistor configurations of Figures 15 and 16 are not shown in the illustrations; however these features are described below. Referring to Figure 15, the low-side and high-side switches 365 and 366, respectively, are both transistors that can each include an insulating or semi-insulating portion 44/44', such as an insulating or semi-insulating substrate. The transistors can both be lateral devices, such as III-N HEMTs, which include source, gate, and drain electrodes 40-42 (or 40'-42'), respectively. The transistors can be high voltage switching transistors. The transistors can both be mounted directly to the package base 23 with the insulating or semi-insulating portions 44/44' adjacent to or contacting the package base 23. The source 40 of the low-side switch 65 is electrically connected to the package base 23, which results in the source 40 being electrically connected to the first source lead 90 of the package (shown in Figure 14). The gate 41 of the low-side switch 365 is electrically connected to the first gate lead 91 of the package (not shown). The gate 41 ' of the high-side switch 366 is electrically connected to the second gate lead 93 of the package (not shown). The drain 42' of the high-side switch 66 is electrically connected to the second drain lead 94 of the package (not shown). The drain 42 of the low-side switch 365 and the source 40' of the high-side switch 366 are both electrically connected to the first drain lead 92 of the package (not shown). Hence, the drain 42 of the low-side switch 365 and the source 40' of the high-side switch 366 are electrically connected to one another.
[0046] The drain 42' of the high-side switch 366 can also be electrically connected to a terminal of a capacitor 76, which can be mounted to the package with the terminal opposite to the terminal connected to the drain 42' electrically connected to the package base 23.
Capacitor 76 can serve the same purpose as the capacitor 72 shown in the circuit diagram of
Figure 10. The configuration of Figure 15 can simplify the manufacturing process of the half bridge, especially as compared to configurations for which each of the two transistors is encased in its own package. Additionally, including capacitor 76 in the package can reduce the parasitic inductances between the circuit AC grounds (33 and 38 in Figure 10) and the output node (78 in Figure 10).
[0047] The configuration of Figure 16 is similar to that of Figure 15, except that the two transistors 365' and 366' are formed on a common insulating or semi-insulating portion 44, such as an insulating or semi-insulating substrate, and the two transistors can share a common active device layer 43. The drain of the low-side switch and the source of the high- side switch can also be formed of a single electrode 96. The transistors can both be lateral devices, such as III-N HEMTs. The transistors can be high voltage switching transistors. The transistors can be mounted directly to the package base 23 with the common insulating or semi-insulating portion 44 adjacent to or contacting the package base 23. The source 40 of the low-side switch can be electrically connected to the package base 23, which results in the source 40 being electrically connected to the first source lead 90 of the package (see Figure 14). The gate 41 of the low-side switch can be electrically connected to the first gate lead 91 of the package (connection not shown). The gate 41 ' of the high-side switch can be electrically connected to the second gate lead 93 of the package (connection not shown). The drain 42' of the high-side switch can be electrically connected to the second drain lead 94 of the package (connection not shown). Electrode 96, which is both the drain of the low-side switch and the source of the high-side switch, can be electrically connected to the first drain lead 92 of the package (connection not shown). The drain 42' of the high-side switch can also be electrically connected to a terminal of a capacitor 76, which can be mounted to the package with the opposite terminal electrically connected to the package base 23. Capacitor 76 can serve the same purpose as the capacitor 72 shown in the circuit diagram of Figure 9. As compared to the configuration of Figure 14, this configuration can further simplify the manufacturing process.
[0048] A number of implementations have been described. Nevertheless, it will be understood that various modifications may be made without departing from the spirit and scope of the techniques and devices described herein. Accordingly, other implementations are within the scope of the following claims.
WHAT IS CLAIMED IS:

Claims

1. An electronic component comprising a high voltage switching transistor encased in a package, wherein
the high voltage switching transistor comprises a source electrode, a gate electrode, and a drain electrode all on a first side of the high voltage switching transistor, and
the source electrode is electrically connected to a conductive structural portion of the package.
2. The electronic component of claim 1, wherein the high voltage switching transistor is a III-N transistor.
3. The electronic component of either of claims 1 or 2, wherein the high voltage
switching transistor is a lateral device.
4. The electronic component of claim 3, wherein the high voltage switching transistor comprises an insulating or semi-insulating substrate.
5. The electronic component of either of claims 1 or 2, wherein the high voltage
switching transistor is configured to operate at a bias of about 300V or higher.
6. The electronic component of either of claims 1 or 2, wherein the high voltage
switching transistor is an enhancement mode transistor.
7. The electronic component of either of claims 1 or 2, wherein the conductive structural portion of the package comprises a package base.
8. The electronic component of claim 7, wherein the conductive structural portion of the package further comprises a package case.
9. The electronic component of either of claims 1 or 2, wherein the conductive structural portion of the package is electrically connected to a heat sink.
10. The electronic component of either of claims 1 or 2, wherein the conductive structural portion of the package is electrically connected to a circuit ground or a DC ground.
11. The electronic component of claim 10, wherein the high voltage switching transistor comprises an insulating or semi-insulating portion.
12. The electronic component of claim 11, wherein the insulating or semi-insulating
portion is an insulating or semi-insulating substrate.
13. The electronic component of claim 11, wherein the high voltage switching transistor is mounted directly on the conductive structural portion of the package with the insulating or semi-insulating portion adjacent to or contacting the conductive structural portion of the package.
14. The electronic component of claim 13, wherein a first ratio of EMI power produced during operation of the electronic component to a total output power of the electronic component is less than a second ratio of EMI power produced during operation of a second electronic component to a total output power of the second electronic component, wherein the second electronic component comprises a high voltage switching transistor with a drain electrode electrically connected to a conductive structural portion of a package of the second electronic component, and the conductive structural portion of the package of the second electronic component is separated from the circuit ground or the DC ground by an insulating spacer.
15. The electronic component of claim 13, wherein a first ratio of switching power loss incurred during operation of the electronic component to a total output power of the electronic component is less than a second ratio of switching power loss incurred during operation of a second component to a total output power of the second electronic component, wherein the second electronic component comprises a high voltage switching transistor with a drain electrode electrically connected to a conductive structural portion of a package of the second electronic component, and the conductive structural portion of the package of the second electronic component is separated from the circuit ground or the DC ground by an insulating spacer.
16. The electronic component of either of claims 1 or 2, wherein the high voltage
switching transistor further comprises an insulating or semi-insulating portion and a semiconductor body, and the insulating or semi-insulating portion is between the semiconductor body and the conductive structural portion of the package.
17. The electronic component of claims 16, wherein the insulating or semi-insulating portion is a shim or a wafer-level shim.
18. A method of forming the electronic component of claim 17, comprising:
forming a semiconductor body on a semiconductor wafer;
attaching the semiconductor wafer to the shim or wafer-level shim; and dicing the semiconductor wafer.
19. The electronic component of either of claims 1 or 2, wherein the package further comprises a gate lead, a source lead, and a drain lead, wherein the drain lead is between the gate lead and the source lead.
20. The electronic component of either of claims 1 or 2, wherein the package further comprises a gate lead, a source lead, and a drain lead, wherein the source lead is between the gate lead and the drain lead.
21. An assembly, comprising:
a first transistor encased in a first package, the first package comprising a first conductive structural portion; and
a second transistor encased in a second package, the second package comprising a second conductive structural portion; wherein a source of the first transistor is electrically connected to the first conductive structural portion and a drain of the second transistor is electrically connected to the second conductive structural portion.
22. An assembly, comprising
a first transistor comprising a first source, the first transistor encased in a first package, the first package comprising a first conductive structural portion, and
a second transistor comprising a second source and a second drain, the second transistor encased in a second package, the second package comprising a second conductive structural portion, wherein
the first source is electrically connected to the first conductive structural portion, the second source is electrically isolated from the second conductive structural portion, and the second drain is electrically isolated from the second conductive structural portion.
23. The assembly of either of claims 21 or 22, wherein the first transistor or the second transistor is a high voltage switching transistor.
24. The assembly of either of claims 21 or 22, wherein the first conductive structural portion or the second conductive structural portion is mounted directly on a heat sink and is electrically connected to the heat sink.
25. The assembly of either of claims 21 or 22, wherein the first conducting structural portion or the second conducting structural portion is electrically connected to a circuit ground or a DC ground.
26. The assembly of claim 21, wherein the second conductive structural portion is
electrically connected to a DC high voltage supply.
27. The assembly of claim 26, wherein the second conductive structural portion is
separated from a circuit ground or a DC ground by an insulating spacer.
28. The assembly of claim 27, wherein a capacitance between the second conductive structural portion and the circuit ground or the DC ground causes the second conductive structural portion to be AC grounded.
29. The assembly of either of claims 21 or 22, wherein a drain of the first transistor is electrically connected to a source of the second transistor.
30. The assembly of claim 29, wherein the first transistor is a low-side switch and the second transistor is a high-side switch.
31. A half bridge comprising the assembly of either of claims 21 or 22.
32. A bridge circuit comprising a plurality of the half bridges of claim 31.
33. The assembly of either of claims 21 or 22, wherein the first transistor or the second transistor is a III-N transistor.
34. The assembly of either of claims 21 or 22, wherein the first transistor or the second transistor is a lateral device.
35. An electronic component, comprising
a first transistor, comprising a first source and a first drain,
a second transistor, comprising a second source and a second drain, and a single package comprising a conductive structural portion, the package encasing both the first transistor and the second transistor, wherein
the first source is electrically connected to the conductive structural portion of the package, the first drain is electrically connected to the second source, and the first transistor is directly mounted to the conductive structural portion of the package.
36. The electronic component of claim 35, wherein the first transistor or the second transistor is a III-N transistor.
37. The electronic component of either of claims 35 or 36, wherein the first transistor and the second transistor share a common substrate.
38. The electronic component of claim 37, wherein the substrate is an insulating or semi- insulating substrate.
39. The electronic component of claim 37, wherein the first drain and the second source are formed of a single electrode.
40. The electronic component of either of claims 35 or 36, further comprising a capacitor, wherein the package encases the capacitor.
41. The electronic component of claim 40, wherein the second drain is electrically
connected to a first terminal of the capacitor and a second terminal of the capacitor is electrically connected to the conductive structural portion of the package.
42. The electronic component of either of claims 35 or 36, wherein the first transistor or the second transistor is a high voltage switching transistor.
43. The electronic component of either of claims 35 or 36, wherein the first transistor or the second transistor is a lateral device.
44. The electronic component of either of claims 35 or 36, wherein the package
comprises a first source lead, a first gate lead, a first drain lead, a second gate lead, and a second drain lead.
45. The electronic component of claim 44, wherein the first transistor further comprises a first gate, the second transistor further comprises a second gate, the conductive structural portion of the package is electrically connected to the first source lead, the first gate is electrically connected to the first gate lead, the second gate is electrically connected to the second gate lead, the second drain is electrically connected to the second drain lead, and the first drain and the second source are both electrically connected to the first drain lead.
PCT/US2010/055129 2009-11-02 2010-11-02 Package configurations for low emi circuits WO2011053981A2 (en)

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8138529B2 (en) 2009-11-02 2012-03-20 Transphorm Inc. Package configurations for low EMI circuits
US8508281B2 (en) 2008-02-12 2013-08-13 Transphorm Inc. Bridge circuits and their components
US8624662B2 (en) 2010-02-05 2014-01-07 Transphorm Inc. Semiconductor electronic components and circuits
JP2014127715A (en) * 2012-12-27 2014-07-07 Toshiba Corp Semiconductor device
US8952750B2 (en) 2012-02-24 2015-02-10 Transphorm Inc. Semiconductor power modules and devices
US9041435B2 (en) 2011-02-28 2015-05-26 Transphorm Inc. Method of forming electronic components with reactive filters
US9059076B2 (en) 2013-04-01 2015-06-16 Transphorm Inc. Gate drivers for circuits based on semiconductor devices
US9209176B2 (en) 2011-12-07 2015-12-08 Transphorm Inc. Semiconductor modules and methods of forming the same
US9401341B2 (en) 2010-01-08 2016-07-26 Transphorm Inc. Electronic devices and components for high efficiency power circuits
US9543940B2 (en) 2014-07-03 2017-01-10 Transphorm Inc. Switching circuits having ferrite beads
US9590494B1 (en) 2014-07-17 2017-03-07 Transphorm Inc. Bridgeless power factor correction circuits
US9690314B2 (en) 2008-09-23 2017-06-27 Transphorm Inc. Inductive load power switching circuits
EP3276806A4 (en) * 2015-06-30 2018-06-13 Omron Corporation Power conversion device
US10200030B2 (en) 2015-03-13 2019-02-05 Transphorm Inc. Paralleling of switching devices for high power circuits
US10319648B2 (en) 2017-04-17 2019-06-11 Transphorm Inc. Conditions for burn-in of high power semiconductors

Families Citing this family (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4848187B2 (en) * 2006-01-17 2011-12-28 日立オートモティブシステムズ株式会社 Power converter
US7915643B2 (en) 2007-09-17 2011-03-29 Transphorm Inc. Enhancement mode gallium nitride power devices
US20090072269A1 (en) * 2007-09-17 2009-03-19 Chang Soo Suh Gallium nitride diodes and integrated components
US8742459B2 (en) * 2009-05-14 2014-06-03 Transphorm Inc. High voltage III-nitride semiconductor devices
US8390000B2 (en) * 2009-08-28 2013-03-05 Transphorm Inc. Semiconductor devices with field plates
US8389977B2 (en) 2009-12-10 2013-03-05 Transphorm Inc. Reverse side engineered III-nitride devices
US9219058B2 (en) * 2010-03-01 2015-12-22 Infineon Technologies Americas Corp. Efficient high voltage switching circuits and monolithic integration of same
US8772842B2 (en) 2011-03-04 2014-07-08 Transphorm, Inc. Semiconductor diodes with low reverse bias currents
US8716141B2 (en) 2011-03-04 2014-05-06 Transphorm Inc. Electrode configurations for semiconductor devices
US8803246B2 (en) 2012-07-16 2014-08-12 Transphorm Inc. Semiconductor electronic components with integrated current limiters
EP2741324B1 (en) * 2012-12-10 2018-10-31 IMEC vzw III nitride transistor with source connected heat-spreading plate and method of making the same
US9087718B2 (en) 2013-03-13 2015-07-21 Transphorm Inc. Enhancement-mode III-nitride devices
JP6211829B2 (en) * 2013-06-25 2017-10-11 株式会社東芝 Semiconductor device
WO2015006111A1 (en) 2013-07-09 2015-01-15 Transphorm Inc. Multilevel inverters and their components
WO2015009514A1 (en) 2013-07-19 2015-01-22 Transphorm Inc. Iii-nitride transistor including a p-type depleting layer
US9362240B2 (en) * 2013-12-06 2016-06-07 Infineon Technologies Austria Ag Electronic device
CN104716128B (en) 2013-12-16 2019-11-22 台达电子企业管理（上海）有限公司 The manufacturing method of power module, supply convertor and power module
US9559056B2 (en) 2014-09-18 2017-01-31 Infineon Technologies Austria Ag Electronic component
KR102377472B1 (en) 2015-03-10 2022-03-23 삼성전자주식회사 Semiconductor packages and methods for fabricating the same
JP6671124B2 (en) * 2015-08-10 2020-03-25 ローム株式会社 Nitride semiconductor device
EP3168871B1 (en) * 2015-11-11 2020-01-08 Nexperia B.V. Semiconductor device and a method of making a semiconductor device
US9991776B2 (en) 2015-12-16 2018-06-05 Semiconductor Components Industries, Llc Switched mode power supply converter
US9899481B2 (en) 2016-01-18 2018-02-20 Infineon Technologies Austria Ag Electronic component and switch circuit
US9722065B1 (en) 2016-02-03 2017-08-01 Taiwan Semiconductor Manufacturing Company Ltd. Semiconductor device
DE102016206501A1 (en) * 2016-04-18 2017-10-19 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Power semiconductor device with two lateral power semiconductor devices in half-bridge circuit
EP3465755A1 (en) * 2016-05-26 2019-04-10 Exagan Integrated circuit comprising a chip formed by a high-voltage transistor and comprising a chip formed by a low-voltage transistor
FR3053833B1 (en) * 2016-07-08 2018-11-16 Exagan INTEGRATED CIRCUIT COMPRISING A FORMED CHIP OF A HIGH VOLTAGE TRANSISTOR COMPRISING A SHAPED CHIP OF A LOW VOLTAGE TRANSISTOR
US9881862B1 (en) 2016-09-20 2018-01-30 Infineon Technologies Austria Ag Top side cooling for GaN power device
US10630285B1 (en) 2017-11-21 2020-04-21 Transphorm Technology, Inc. Switching circuits having drain connected ferrite beads
US10199487B1 (en) * 2018-05-15 2019-02-05 The Florida International University Board Of Trustees Multi-drain gallium-nitride module with multiple voltage ratings
US10756207B2 (en) 2018-10-12 2020-08-25 Transphorm Technology, Inc. Lateral III-nitride devices including a vertical gate module
JP2022525654A (en) 2019-03-21 2022-05-18 トランスフォーム テクノロジー，インコーポレーテッド Integrated design for Group III nitride devices
DE102020106492A1 (en) 2019-04-12 2020-10-15 Infineon Technologies Ag CHIP PACKAGE, METHOD OF FORMING A CHIP PACKAGE, SEMICONDUCTOR DEVICE, SEMICONDUCTOR ARRANGEMENT, THREE-PHASE SYSTEM, METHOD FOR FORMING A SEMICONDUCTOR DEVICE, AND METHOD FOR FORMING A SEMICONDUCTOR ARRANGEMENT
KR102587044B1 (en) * 2019-07-12 2023-10-06 알파 앤드 오메가 세미컨덕터 (케이맨) 리미티드 Super-Fast Transient Response (STR) AC/DC Converter For High Power Density Charging Application
KR102590673B1 (en) * 2019-07-12 2023-10-17 알파 앤드 오메가 세미컨덕터 (케이맨) 리미티드 Super-Fast Transient Response (STR) AC/DC Converter For High Power Density Charging Application
JP7297147B2 (en) * 2020-03-27 2023-06-23 三菱電機株式会社 Semiconductor power module and power converter
US11749656B2 (en) 2020-06-16 2023-09-05 Transphorm Technology, Inc. Module configurations for integrated III-Nitride devices
US20220037519A1 (en) * 2020-07-29 2022-02-03 Fu-Chang Hsu Transistor structures and associated processes
CN116325158A (en) 2020-08-05 2023-06-23 创世舫科技有限公司 Group III nitride device including depletion layer
WO2023122694A2 (en) * 2021-12-22 2023-06-29 Transphorm Technology, Inc. Module assembly of multiple semiconductor devices with insulating substrates

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6384492B1 (en) 1995-05-04 2002-05-07 Spinel Llc Power semiconductor packaging
US20070051977A1 (en) 2005-08-24 2007-03-08 Kabushiki Kaisha Toshiba Nitride semiconductor device
US20070254431A1 (en) 2006-04-26 2007-11-01 Kabushiki Kaisha Toshiba Nitride semiconductor device
US20080191216A1 (en) 2007-02-09 2008-08-14 Sanken Electric Co., Ltd. Diode-Like Composite Semiconductor Device

Family Cites Families (143)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55149871A (en) 1978-07-31 1980-11-21 Fujitsu Ltd Line voltage detector
JPS55136726A (en) * 1979-04-11 1980-10-24 Nec Corp High voltage mos inverter and its drive method
JPS59168677A (en) * 1983-03-14 1984-09-22 Fujitsu Ltd Manufacture of semiconductor device
US5952956A (en) * 1984-12-03 1999-09-14 Time Domain Corporation Time domain radio transmission system
US4707726A (en) 1985-04-29 1987-11-17 United Technologies Automotive, Inc. Heat sink mounting arrangement for a semiconductor
US4665508A (en) 1985-05-23 1987-05-12 Texas Instruments Incorporated Gallium arsenide MESFET memory
DE3529869A1 (en) 1985-08-21 1987-02-26 Basf Ag METHOD FOR HYDROPHOBIZING LEATHER AND FURS
US4728826A (en) * 1986-03-19 1988-03-01 Siemens Aktiengesellschaft MOSFET switch with inductive load
US4808853A (en) * 1987-11-25 1989-02-28 Triquint Semiconductor, Inc. Tristate output circuit with selectable output impedance
JP2901091B2 (en) * 1990-09-27 1999-06-02 株式会社日立製作所 Semiconductor device
US6143582A (en) * 1990-12-31 2000-11-07 Kopin Corporation High density electronic circuit modules
JPH0575040A (en) 1991-09-13 1993-03-26 Fujitsu Ltd Semiconductor integrated circuit device
JPH05328742A (en) * 1992-05-19 1993-12-10 Matsushita Electric Ind Co Ltd Dc-ac converter
JPH0667744A (en) 1992-08-18 1994-03-11 Fujitsu Ltd Constant-voltage circuit
US5379209A (en) * 1993-02-09 1995-01-03 Performance Controls, Inc. Electronic switching circuit
US5493487A (en) * 1993-02-09 1996-02-20 Performance Controls, Inc. Electronic switching circuit
JPH0748909Y2 (en) 1993-03-03 1995-11-08 株式会社日中製作所 Adjustable latch receiver
US5637922A (en) * 1994-02-07 1997-06-10 General Electric Company Wireless radio frequency power semiconductor devices using high density interconnect
JP3665419B2 (en) 1996-05-02 2005-06-29 新電元工業株式会社 Inductive load driving method and H-bridge circuit control device
US6172550B1 (en) 1996-08-16 2001-01-09 American Superconducting Corporation Cryogenically-cooled switching circuit
JP3527034B2 (en) * 1996-09-20 2004-05-17 株式会社半導体エネルギー研究所 Semiconductor device
US6008684A (en) * 1996-10-23 1999-12-28 Industrial Technology Research Institute CMOS output buffer with CMOS-controlled lateral SCR devices
US5789951A (en) 1997-01-31 1998-08-04 Motorola, Inc. Monolithic clamping circuit and method of preventing transistor avalanche breakdown
JP3731358B2 (en) 1998-09-25 2006-01-05 株式会社村田製作所 High frequency power amplifier circuit
US6107844A (en) * 1998-09-28 2000-08-22 Tripath Technology, Inc. Methods and apparatus for reducing MOSFET body diode conduction in a half-bridge configuration
JP3275851B2 (en) 1998-10-13 2002-04-22 松下電器産業株式会社 High frequency integrated circuit
JP3049427B2 (en) * 1998-10-21 2000-06-05 株式会社ハイデン研究所 Positive and negative pulse type high frequency switching power supply
US6395593B1 (en) * 1999-05-06 2002-05-28 Texas Instruments Incorporated Method of manufacturing high side and low side guard rings for lowest parasitic performance in an H-bridge configuration
US6864131B2 (en) * 1999-06-02 2005-03-08 Arizona State University Complementary Schottky junction transistors and methods of forming the same
JP3458768B2 (en) * 1999-06-10 2003-10-20 株式会社デンソー Load drive
US6556053B2 (en) * 2001-02-06 2003-04-29 Harman International Industries, Incorporated Half-bridge gate driver optimized for hard-switching
US6455905B1 (en) * 2001-04-05 2002-09-24 Ericsson Inc. Single chip push-pull power transistor device
DE10142971A1 (en) * 2001-09-01 2003-03-27 Eupec Gmbh & Co Kg The power semiconductor module
US6650169B2 (en) 2001-10-01 2003-11-18 Koninklijke Philips Electronics N.V. Gate driver apparatus having an energy recovering circuit
JP2003168694A (en) * 2001-12-03 2003-06-13 Mitsubishi Electric Corp Semiconductor package
JP2003244943A (en) 2002-02-13 2003-08-29 Honda Motor Co Ltd Booster for power unit
US7122884B2 (en) * 2002-04-16 2006-10-17 Fairchild Semiconductor Corporation Robust leaded molded packages and methods for forming the same
DE10219760A1 (en) * 2002-05-02 2003-11-20 Eupec Gmbh & Co Kg Half-bridge circuit
JP3731562B2 (en) 2002-05-22 2006-01-05 日産自動車株式会社 Current control element drive circuit
US6975023B2 (en) 2002-09-04 2005-12-13 International Rectifier Corporation Co-packaged control circuit, transistor and inverted diode
KR20050061574A (en) * 2002-10-29 2005-06-22 코닌클리즈케 필립스 일렉트로닉스 엔.브이. Bi-directional double nmos switch
JP4385205B2 (en) * 2002-12-16 2009-12-16 日本電気株式会社 Field effect transistor
US20040227476A1 (en) * 2002-12-19 2004-11-18 International Rectifier Corp. Flexible inverter power module for motor drives
US6825559B2 (en) * 2003-01-02 2004-11-30 Cree, Inc. Group III nitride based flip-chip intergrated circuit and method for fabricating
TW583636B (en) 2003-03-11 2004-04-11 Toppoly Optoelectronics Corp Source follower capable of compensating the threshold voltage
JP4241106B2 (en) 2003-03-12 2009-03-18 シャープ株式会社 Semiconductor device and manufacturing method thereof
JP4531343B2 (en) 2003-03-26 2010-08-25 株式会社半導体エネルギー研究所 Driving circuit
GB0308674D0 (en) * 2003-04-15 2003-05-21 Koninkl Philips Electronics Nv Driver for inductive load
JP4248953B2 (en) * 2003-06-30 2009-04-02 株式会社ルネサステクノロジ Semiconductor device and manufacturing method thereof
EP1494354B1 (en) * 2003-07-04 2010-12-01 Dialog Semiconductor GmbH High-voltage interface and driver control circuit
JP2005044873A (en) * 2003-07-24 2005-02-17 Renesas Technology Corp Method for manufacturing semiconductor device, and semiconductor device
JP3973638B2 (en) 2003-09-05 2007-09-12 三洋電機株式会社 Power supply unit and power supply system having the same
US7501669B2 (en) 2003-09-09 2009-03-10 Cree, Inc. Wide bandgap transistor devices with field plates
US6900657B2 (en) * 2003-09-24 2005-05-31 Saia-Burgess Automotive, Inc. Stall detection circuit and method
DE10344841B4 (en) * 2003-09-26 2010-02-25 Infineon Technologies Ag Drive circuit for an ignition element of an occupant protection system
US7166867B2 (en) 2003-12-05 2007-01-23 International Rectifier Corporation III-nitride device with improved layout geometry
US7193396B2 (en) 2003-12-24 2007-03-20 Potentia Semiconductor Corporation DC converters having buck or boost configurations
JP4658481B2 (en) * 2004-01-16 2011-03-23 ルネサスエレクトロニクス株式会社 Semiconductor device
US7382001B2 (en) * 2004-01-23 2008-06-03 International Rectifier Corporation Enhancement mode III-nitride FET
US7465997B2 (en) * 2004-02-12 2008-12-16 International Rectifier Corporation III-nitride bidirectional switch
US7550781B2 (en) 2004-02-12 2009-06-23 International Rectifier Corporation Integrated III-nitride power devices
JP2005295794A (en) 2004-03-31 2005-10-20 Matsushita Electric Ind Co Ltd Active diode
JP2005302951A (en) * 2004-04-09 2005-10-27 Toshiba Corp Semiconductor device package for power
JP2006032552A (en) * 2004-07-14 2006-02-02 Toshiba Corp Semiconductor device containing nitride
JP2006033723A (en) 2004-07-21 2006-02-02 Sharp Corp Optical coupling element for power control and electronic equipment using it
JP2006049402A (en) * 2004-08-02 2006-02-16 Matsushita Electric Ind Co Ltd Inverter device
US7227198B2 (en) * 2004-08-11 2007-06-05 International Rectifier Corporation Half-bridge package
JP4637553B2 (en) 2004-11-22 2011-02-23 パナソニック株式会社 Schottky barrier diode and integrated circuit using the same
CN100359686C (en) 2004-11-30 2008-01-02 万代半导体元件（上海）有限公司 Thin and small outer shape package combined by metal oxide semiconductor field effect transistor and schottky diode
JP2006173754A (en) 2004-12-13 2006-06-29 Oki Electric Ind Co Ltd High frequency switch
US7116567B2 (en) * 2005-01-05 2006-10-03 Velox Semiconductor Corporation GaN semiconductor based voltage conversion device
US7239108B2 (en) * 2005-01-31 2007-07-03 Texas Instruments Incorporated Method for stepper motor position referencing
US7612602B2 (en) 2005-01-31 2009-11-03 Queen's University At Kingston Resonant gate drive circuits
JP2006223016A (en) * 2005-02-08 2006-08-24 Renesas Technology Corp Power supply system, multi-chip module, system-in-package, and non-isolated dc-dc converter
US7745930B2 (en) 2005-04-25 2010-06-29 International Rectifier Corporation Semiconductor device packages with substrates for redistributing semiconductor device electrodes
US7368980B2 (en) 2005-04-25 2008-05-06 Triquint Semiconductor, Inc. Producing reference voltages using transistors
US7408399B2 (en) 2005-06-27 2008-08-05 International Rectifier Corporation Active driving of normally on, normally off cascoded configuration devices through asymmetrical CMOS
US7855401B2 (en) 2005-06-29 2010-12-21 Cree, Inc. Passivation of wide band-gap based semiconductor devices with hydrogen-free sputtered nitrides
JP4730529B2 (en) 2005-07-13 2011-07-20 サンケン電気株式会社 Field effect transistor
US7548112B2 (en) * 2005-07-21 2009-06-16 Cree, Inc. Switch mode power amplifier using MIS-HEMT with field plate extension
US7482788B2 (en) * 2005-10-12 2009-01-27 System General Corp. Buck converter for both full load and light load operations
US7932539B2 (en) 2005-11-29 2011-04-26 The Hong Kong University Of Science And Technology Enhancement-mode III-N devices, circuits, and methods
US20070138515A1 (en) * 2005-12-19 2007-06-21 M/A-Com, Inc. Dual field plate MESFET
WO2007072775A1 (en) * 2005-12-22 2007-06-28 Ntn Corporation Fluid bearing device
JP5065595B2 (en) 2005-12-28 2012-11-07 株式会社東芝 Nitride semiconductor devices
US7592688B2 (en) * 2006-01-13 2009-09-22 International Rectifier Corporation Semiconductor package
US20070164428A1 (en) * 2006-01-18 2007-07-19 Alan Elbanhawy High power module with open frame package
JP2007215331A (en) 2006-02-10 2007-08-23 Hitachi Ltd Voltage booster circuit
US7521907B2 (en) 2006-03-06 2009-04-21 Enpirion, Inc. Controller for a power converter and method of operating the same
JP2007242853A (en) 2006-03-08 2007-09-20 Sanken Electric Co Ltd Semiconductor substrate and semiconductor device using it
US20080017998A1 (en) * 2006-07-19 2008-01-24 Pavio Jeanne S Semiconductor component and method of manufacture
US7893676B2 (en) 2006-07-20 2011-02-22 Enpirion, Inc. Driver for switch and a method of driving the same
US7902809B2 (en) 2006-11-28 2011-03-08 International Rectifier Corporation DC/DC converter including a depletion mode power switch
US20080134267A1 (en) 2006-12-04 2008-06-05 Alcatel Lucent Remote Access to Internet Protocol Television by Enabling Place Shifting Utilizing a Telephone Company Network
US7863877B2 (en) * 2006-12-11 2011-01-04 International Rectifier Corporation Monolithically integrated III-nitride power converter
JP2008164796A (en) 2006-12-27 2008-07-17 Sony Corp Pixel circuit and display device and driving method thereof
US7378883B1 (en) 2007-01-03 2008-05-27 Tpo Displays Corp. Source follower and electronic system utilizing the same
US7746020B2 (en) 2007-01-22 2010-06-29 Johnson Controls Technology Company Common mode & differential mode filter for variable speed drive
US7853812B2 (en) * 2007-02-07 2010-12-14 International Business Machines Corporation Reducing power usage in a software application
US8188596B2 (en) * 2007-02-09 2012-05-29 Infineon Technologies Ag Multi-chip module
JP2008199771A (en) 2007-02-13 2008-08-28 Fujitsu Ten Ltd Boosting circuit control device and boosting circuit
KR101391925B1 (en) * 2007-02-28 2014-05-07 페어차일드코리아반도체 주식회사 Semiconductor package and semiconductor package mold for fabricating the same
JP2008244394A (en) * 2007-03-29 2008-10-09 Sumitomo Electric Ind Ltd Semiconductor device
US7453107B1 (en) * 2007-05-04 2008-11-18 Dsm Solutions, Inc. Method for applying a stress layer to a semiconductor device and device formed therefrom
US7719055B1 (en) 2007-05-10 2010-05-18 Northrop Grumman Systems Corporation Cascode power switch topologies
US7477082B2 (en) 2007-05-15 2009-01-13 Freescale Semiconductor, Inc. Method and circuit for driving H-bridge that reduces switching noise
JP2008288289A (en) * 2007-05-16 2008-11-27 Oki Electric Ind Co Ltd Field-effect transistor and its manufacturing method
JP4478175B2 (en) 2007-06-26 2010-06-09 株式会社東芝 Semiconductor device
US20090251119A1 (en) * 2007-08-13 2009-10-08 Goran Stojcic Three chip package
JP4775859B2 (en) 2007-08-24 2011-09-21 シャープ株式会社 Nitride semiconductor device and power conversion device including the same
WO2009036266A2 (en) 2007-09-12 2009-03-19 Transphorm Inc. Iii-nitride bidirectional switches
US7795642B2 (en) * 2007-09-14 2010-09-14 Transphorm, Inc. III-nitride devices with recessed gates
US20090072269A1 (en) * 2007-09-17 2009-03-19 Chang Soo Suh Gallium nitride diodes and integrated components
US7915643B2 (en) * 2007-09-17 2011-03-29 Transphorm Inc. Enhancement mode gallium nitride power devices
CN101897029B (en) * 2007-12-10 2015-08-12 特兰斯夫公司 Insulated gate E-mode transistors
JP5130906B2 (en) 2007-12-26 2013-01-30 サンケン電気株式会社 Switch device
US8063616B2 (en) 2008-01-11 2011-11-22 International Rectifier Corporation Integrated III-nitride power converter circuit
US7639064B2 (en) * 2008-01-21 2009-12-29 Eutech Microelectronic Inc. Drive circuit for reducing inductive kickback voltage
US7965126B2 (en) 2008-02-12 2011-06-21 Transphorm Inc. Bridge circuits and their components
JP2009200338A (en) * 2008-02-22 2009-09-03 Renesas Technology Corp Method for manufacturing semiconductor device
JP2009218475A (en) * 2008-03-12 2009-09-24 Sharp Corp Output control device, and ac/dc power source device and circuit device using the same
US7920013B2 (en) 2008-04-18 2011-04-05 Linear Technology Corporation Systems and methods for oscillation suppression in switching circuits
US8519438B2 (en) 2008-04-23 2013-08-27 Transphorm Inc. Enhancement mode III-N HEMTs
US8957642B2 (en) 2008-05-06 2015-02-17 International Rectifier Corporation Enhancement mode III-nitride switch with increased efficiency and operating frequency
US7804328B2 (en) 2008-06-23 2010-09-28 Texas Instruments Incorporated Source/emitter follower buffer driving a switching load and having improved linearity
JP5524462B2 (en) * 2008-08-06 2014-06-18 シャープ株式会社 Semiconductor device
TWI371163B (en) * 2008-09-12 2012-08-21 Glacialtech Inc Unidirectional mosfet and applications thereof
US8289065B2 (en) 2008-09-23 2012-10-16 Transphorm Inc. Inductive load power switching circuits
US7893791B2 (en) 2008-10-22 2011-02-22 The Boeing Company Gallium nitride switch methodology
US8084783B2 (en) 2008-11-10 2011-12-27 International Rectifier Corporation GaN-based device cascoded with an integrated FET/Schottky diode device
US7898004B2 (en) 2008-12-10 2011-03-01 Transphorm Inc. Semiconductor heterostructure diodes
US8054110B2 (en) 2009-01-20 2011-11-08 University Of South Carolina Driver circuit for gallium nitride (GaN) heterojunction field effect transistors (HFETs)
US7884394B2 (en) 2009-02-09 2011-02-08 Transphorm Inc. III-nitride devices and circuits
US8681518B2 (en) 2009-07-21 2014-03-25 Cree, Inc. High speed rectifier circuit
US8138529B2 (en) 2009-11-02 2012-03-20 Transphorm Inc. Package configurations for low EMI circuits
US8816497B2 (en) 2010-01-08 2014-08-26 Transphorm Inc. Electronic devices and components for high efficiency power circuits
US8624662B2 (en) 2010-02-05 2014-01-07 Transphorm Inc. Semiconductor electronic components and circuits
US8530904B2 (en) 2010-03-19 2013-09-10 Infineon Technologies Austria Ag Semiconductor device including a normally-on transistor and a normally-off transistor
US8742460B2 (en) 2010-12-15 2014-06-03 Transphorm Inc. Transistors with isolation regions
US8786327B2 (en) 2011-02-28 2014-07-22 Transphorm Inc. Electronic components with reactive filters
US9166028B2 (en) 2011-05-31 2015-10-20 Infineon Technologies Austria Ag Circuit configured to adjust the activation state of transistors based on load conditions
US9209176B2 (en) 2011-12-07 2015-12-08 Transphorm Inc. Semiconductor modules and methods of forming the same
US8648643B2 (en) 2012-02-24 2014-02-11 Transphorm Inc. Semiconductor power modules and devices

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6384492B1 (en) 1995-05-04 2002-05-07 Spinel Llc Power semiconductor packaging
US20070051977A1 (en) 2005-08-24 2007-03-08 Kabushiki Kaisha Toshiba Nitride semiconductor device
US20070254431A1 (en) 2006-04-26 2007-11-01 Kabushiki Kaisha Toshiba Nitride semiconductor device
US20080191216A1 (en) 2007-02-09 2008-08-14 Sanken Electric Co., Ltd. Diode-Like Composite Semiconductor Device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2497109A4

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8508281B2 (en) 2008-02-12 2013-08-13 Transphorm Inc. Bridge circuits and their components
US9899998B2 (en) 2008-02-12 2018-02-20 Transphorm Inc. Bridge circuits and their components
US9690314B2 (en) 2008-09-23 2017-06-27 Transphorm Inc. Inductive load power switching circuits
US9190295B2 (en) 2009-11-02 2015-11-17 Transphorm Inc. Package configurations for low EMI circuits
US8890314B2 (en) 2009-11-02 2014-11-18 Transphorm, Inc. Package configurations for low EMI circuits
US8138529B2 (en) 2009-11-02 2012-03-20 Transphorm Inc. Package configurations for low EMI circuits
US9401341B2 (en) 2010-01-08 2016-07-26 Transphorm Inc. Electronic devices and components for high efficiency power circuits
US8624662B2 (en) 2010-02-05 2014-01-07 Transphorm Inc. Semiconductor electronic components and circuits
US9041435B2 (en) 2011-02-28 2015-05-26 Transphorm Inc. Method of forming electronic components with reactive filters
US9209176B2 (en) 2011-12-07 2015-12-08 Transphorm Inc. Semiconductor modules and methods of forming the same
US9818686B2 (en) 2011-12-07 2017-11-14 Transphorm Inc. Semiconductor modules and methods of forming the same
US9741702B2 (en) 2012-02-24 2017-08-22 Transphorm Inc. Semiconductor power modules and devices
US9224721B2 (en) 2012-02-24 2015-12-29 Transphorm Inc. Semiconductor power modules and devices
US8952750B2 (en) 2012-02-24 2015-02-10 Transphorm Inc. Semiconductor power modules and devices
JP2014127715A (en) * 2012-12-27 2014-07-07 Toshiba Corp Semiconductor device
US9362903B2 (en) 2013-04-01 2016-06-07 Transphorm Inc. Gate drivers for circuits based on semiconductor devices
US9059076B2 (en) 2013-04-01 2015-06-16 Transphorm Inc. Gate drivers for circuits based on semiconductor devices
US9543940B2 (en) 2014-07-03 2017-01-10 Transphorm Inc. Switching circuits having ferrite beads
US9660640B2 (en) 2014-07-03 2017-05-23 Transphorm Inc. Switching circuits having ferrite beads
US9991884B2 (en) 2014-07-03 2018-06-05 Transphorm Inc. Switching circuits having ferrite beads
US9590494B1 (en) 2014-07-17 2017-03-07 Transphorm Inc. Bridgeless power factor correction circuits
US10063138B1 (en) 2014-07-17 2018-08-28 Transphorm Inc. Bridgeless power factor correction circuits
US10200030B2 (en) 2015-03-13 2019-02-05 Transphorm Inc. Paralleling of switching devices for high power circuits
EP3276806A4 (en) * 2015-06-30 2018-06-13 Omron Corporation Power conversion device
US10361628B2 (en) 2015-06-30 2019-07-23 Omron Corporation Power converter
US10319648B2 (en) 2017-04-17 2019-06-11 Transphorm Inc. Conditions for burn-in of high power semiconductors

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US20140377911A1 (en) 2014-12-25
US20130234257A1 (en) 2013-09-12
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US20140048849A1 (en) 2014-02-20
US8890314B2 (en) 2014-11-18
US9190295B2 (en) 2015-11-17
US20120132973A1 (en) 2012-05-31
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EP2497109B1 (en) 2021-01-27
TW201126686A (en) 2011-08-01

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